Grant Balfour
P · Last on a Brewers farm club: Huntsville Stars, 2007
- B/T
- R/R
- Size
- 6' 2", 200 lb
- Born
- 1977-12-30 · Sydney, New South Wales, Australia
- Acquired
- —
- MLB debut
- 2001-07-22
The path and tables below cover his minor-league seasons with any club, as the MLB Stats API lists them, through 2026. His major-league seasons are in the "Major leagues" section.
Level path
- ROK1997GCL Twins
- ROK1998Elizabethton Twins
- A1999Quad City River Bandits
- A+2000Fort Myers Miracle
- AA2001New Britain Rock Cats
- AAA2001Edmonton Trappers
- AAA2002Edmonton Trappers
- AAA2003Rochester Red Wings
- ROK2006GCL Reds
- A2006Dayton Dragons
- A+2006Sarasota Reds
- AA2007Huntsville Stars
- AAA2007Nashville Sounds
- AAA2008Durham Bulls
- A+2010Charlotte Stone Crabs
- AAA2011Sacramento River Cats
- AAA2015Durham Bulls
Pitching
| Year | Lvl | Club | Age | Games pitched in. | Games started. | Wins. | Losses. | Saves. | Innings pitched. The digit after the point is outs: 110.1 is 110 innings and one out. | Hits allowed. | Walks allowed. | Strikeouts. | Home runs allowed. | Earned run average: earned runs allowed per nine innings. | Walks plus hits allowed per inning pitched. | Strikeouts per nine innings. | Walks per nine innings. | Strikeout rate: strikeouts divided by batters faced. | Walk rate: walks divided by batters faced. | Strikeout rate minus walk rate, both as a share of batters faced. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | ROK | GCL Twins | 19 | 13 | 12 | 2 | 4 | 0 | 67.0 | 73 | 20 | 43 | 1 | 3.76 | 1.39 | 5.78 | 2.69 | 15.6% | 7.3% | 8.4% |
| 1998 | ROK | Elizabethton Twins | 20 | 13 | 13 | 7 | 2 | 0 | 77.2 | 70 | 27 | 75 | 7 | 3.36 | 1.25 | 8.69 | 3.13 | 22.9% | 8.3% | 14.7% |
| 1999 | A | Quad City River Bandits | 21 | 19 | 14 | 8 | 5 | 1 | 91.2 | 66 | 37 | 95 | 7 | 3.53 | 1.12 | 9.33 | 3.63 | 25.8% | 10.1% | 15.8% |
| 2000 | A+ | Fort Myers Miracle | 22 | 35 | 10 | 8 | 5 | 6 | 89.0 | 91 | 34 | 90 | 8 | 4.25 | 1.40 | 9.10 | 3.44 | 23.0% | 8.7% | 14.3% |
| 2001 | AA | New Britain Rock Cats | 23 | 35 | 0 | 2 | 1 | 13 | 50.0 | 26 | 22 | 72 | 1 | 1.08 | 0.96 | 12.96 | 3.96 | 36.5% | 11.2% | 25.4% |
| 2001 | AAA | Edmonton Trappers | 23 | 11 | 0 | 2 | 2 | 0 | 16.1 | 18 | 10 | 17 | 2 | 5.51 | 1.71 | 9.37 | 5.51 | 23.3% | 13.7% | 9.6% |
| 2002 | AAA | Edmonton Trappers | 24 | 58 | 0 | 2 | 4 | 8 | 71.1 | 60 | 30 | 88 | 3 | 4.16 | 1.26 | 11.10 | 3.79 | 29.7% | 10.1% | 19.6% |
| 2003 | AAA | Rochester Red Wings | 25 | 21 | 11 | 5 | 2 | 5 | 71.0 | 48 | 16 | 87 | 6 | 2.41 | 0.90 | 11.03 | 2.03 | 31.5% | 5.8% | 25.7% |
| 2006 | ROK | GCL Reds | 28 | 2 | 2 | 0 | 0 | 0 | 1.1 | 1 | 3 | 2 | 0 | 13.50 | 3.00 | 13.50 | 20.25 | 25.0% | 37.5% | -12.5% |
| 2006 | A | Dayton Dragons | 28 | 2 | 0 | 0 | 0 | 0 | 2.0 | 0 | 0 | 3 | 0 | 0.00 | 0.00 | 13.50 | 0.00 | 50.0% | 0.0% | 50.0% |
| 2006 | A+ | Sarasota Reds | 28 | 5 | 0 | 0 | 0 | 0 | 5.2 | 8 | 3 | 7 | 0 | 7.94 | 1.94 | 11.12 | 4.76 | 23.3% | 10.0% | 13.3% |
| 2007 | AA | Huntsville Stars | 29 | 8 | 0 | 0 | 0 | 2 | 11.1 | 8 | 4 | 21 | 0 | 2.38 | 1.06 | 16.68 | 3.18 | 44.7% | 8.5% | 36.2% |
| 2007 | AAA | Nashville Sounds | 29 | 24 | 0 | 1 | 1 | 5 | 32.0 | 17 | 11 | 47 | 2 | 1.69 | 0.88 | 13.22 | 3.09 | 38.8% | 9.1% | 29.8% |
| 2008 | AAA | Durham Bulls | 30 | 15 | 0 | 1 | 0 | 8 | 23.2 | 5 | 10 | 39 | 1 | 0.38 | 0.63 | 14.83 | 3.80 | 45.9% | 11.8% | 34.1% |
| 2010 | A+ | Charlotte Stone Crabs | 32 | 2 | 2 | 0 | 1 | 0 | 1.2 | 2 | 3 | 2 | 0 | 10.80 | 3.00 | 10.80 | 16.20 | 20.0% | 30.0% | -10.0% |
| 2011 | AAA | Sacramento River Cats | 33 | 1 | 0 | 0 | 0 | 0 | 1.0 | 2 | 1 | 0 | 0 | 9.00 | 3.00 | 0.00 | 9.00 | 0.0% | 16.7% | -16.7% |
| 2015 | AAA | Durham Bulls | 37 | 8 | 0 | 0 | 0 | 0 | 9.2 | 9 | 4 | 11 | 1 | 2.79 | 1.34 | 10.24 | 3.72 | 26.2% | 9.5% | 16.7% |
Hitting
| Year | Lvl | Club | Age | Games played. | Plate appearances: every trip to the plate, walks and hit-by-pitches included. | Hits. | Doubles. | Triples. | Home runs. | Runs scored. | Runs batted in. | Walks. | Strikeouts. | Stolen bases. | Batting average: hits divided by at-bats. | On-base percentage: how often he reaches base by a hit, walk or hit-by-pitch. | Slugging percentage: total bases divided by at-bats. | On-base plus slugging: OBP and SLG added together. | Isolated power: SLG minus AVG. It counts only the extra bases. | Strikeout rate: strikeouts divided by plate appearances. | Walk rate: walks divided by plate appearances. | Batting average on balls in play: hits other than home runs, divided by at-bats that ended with the ball in play. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | AA | Huntsville Stars | 29 | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | 0.0% | 0.0% | — |
| 2007 | AAA | Nashville Sounds | 29 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
Major leagues
Pitching
| Year | Club | Age | Games pitched in. | Games started. | Wins. | Losses. | Saves. | Innings pitched. The digit after the point is outs: 110.1 is 110 innings and one out. | Hits allowed. | Walks allowed. | Strikeouts. | Home runs allowed. | Earned run average: earned runs allowed per nine innings. | Walks plus hits allowed per inning pitched. | Strikeouts per nine innings. | Walks per nine innings. | Strikeout rate: strikeouts divided by batters faced. | Walk rate: walks divided by batters faced. | Strikeout rate minus walk rate, both as a share of batters faced. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | Minnesota Twins | 23 | 2 | 0 | 0 | 0 | 0 | 2.2 | 3 | 3 | 2 | 2 | 13.50 | 2.25 | 6.75 | 10.13 | 14.3% | 21.4% | -7.1% |
| 2003 | Minnesota Twins | 25 | 17 | 1 | 1 | 0 | 0 | 26.0 | 23 | 14 | 30 | 4 | 4.15 | 1.42 | 10.38 | 4.85 | 26.1% | 12.2% | 13.9% |
| 2004 | Minnesota Twins | 26 | 36 | 0 | 4 | 1 | 0 | 39.1 | 35 | 21 | 42 | 4 | 4.35 | 1.42 | 9.61 | 4.81 | 24.4% | 12.2% | 12.2% |
| 2007 | Milwaukee Brewers | 29 | 3 | 0 | 0 | 2 | 0 | 2.2 | 4 | 4 | 3 | 1 | 20.25 | 3.00 | 10.13 | 13.50 | 16.7% | 22.2% | -5.6% |
| 2007 | Tampa Bay Devil Rays | 29 | 22 | 0 | 1 | 0 | 0 | 22.0 | 26 | 16 | 27 | 1 | 6.14 | 1.91 | 11.05 | 6.55 | 26.2% | 15.5% | 10.7% |
| 2007 | 2 teams | 29 | 25 | 0 | 1 | 2 | 0 | 24.2 | 30 | 20 | 30 | 2 | 7.66 | 2.03 | 10.95 | 7.30 | 24.8% | 16.5% | 8.3% |
| 2008 | Tampa Bay Rays | 30 | 51 | 0 | 6 | 2 | 4 | 58.1 | 28 | 24 | 82 | 3 | 1.54 | 0.89 | 12.65 | 3.70 | 36.6% | 10.7% | 25.9% |
| 2009 | Tampa Bay Rays | 31 | 73 | 0 | 5 | 4 | 4 | 67.1 | 59 | 33 | 69 | 6 | 4.81 | 1.37 | 9.22 | 4.41 | 23.9% | 11.4% | 12.5% |
| 2010 | Tampa Bay Rays | 32 | 57 | 0 | 2 | 1 | 0 | 55.1 | 43 | 17 | 56 | 3 | 2.28 | 1.08 | 9.11 | 2.77 | 25.2% | 7.7% | 17.6% |
| 2011 | Oakland Athletics | 33 | 62 | 0 | 5 | 2 | 2 | 62.0 | 44 | 20 | 59 | 8 | 2.47 | 1.03 | 8.56 | 2.90 | 24.4% | 8.3% | 16.1% |
| 2012 | Oakland Athletics | 34 | 75 | 0 | 3 | 2 | 24 | 74.2 | 41 | 28 | 72 | 4 | 2.53 | 0.92 | 8.68 | 3.38 | 24.9% | 9.7% | 15.2% |
| 2013 | Oakland Athletics | 35 | 65 | 0 | 1 | 3 | 38 | 62.2 | 48 | 27 | 72 | 7 | 2.59 | 1.20 | 10.34 | 3.88 | 27.5% | 10.3% | 17.2% |
| 2014 | Tampa Bay Rays | 36 | 65 | 0 | 2 | 6 | 12 | 62.1 | 49 | 41 | 57 | 3 | 4.91 | 1.44 | 8.23 | 5.92 | 21.1% | 15.2% | 5.9% |
| 2015 | Tampa Bay Rays | 37 | 6 | 0 | 0 | 0 | 0 | 4.1 | 3 | 4 | 0 | 1 | 6.23 | 1.62 | 0.00 | 8.31 | 0.0% | 19.0% | -19.0% |
Hitting
| Year | Club | Age | Games played. | Plate appearances: every trip to the plate, walks and hit-by-pitches included. | Hits. | Doubles. | Triples. | Home runs. | Runs scored. | Runs batted in. | Walks. | Strikeouts. | Stolen bases. | Batting average: hits divided by at-bats. | On-base percentage: how often he reaches base by a hit, walk or hit-by-pitch. | Slugging percentage: total bases divided by at-bats. | On-base plus slugging: OBP and SLG added together. | Isolated power: SLG minus AVG. It counts only the extra bases. | Strikeout rate: strikeouts divided by plate appearances. | Walk rate: walks divided by plate appearances. | Batting average on balls in play: hits other than home runs, divided by at-bats that ended with the ball in play. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2004 | Minnesota Twins | 26 | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2007 | Milwaukee Brewers | 29 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2008 | Tampa Bay Rays | 30 | 51 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | .000 | .000 | .000 | .000 | .000 | 100.0% | 0.0% | — |
| 2009 | Tampa Bay Rays | 31 | 73 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2010 | Tampa Bay Rays | 32 | 57 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2011 | Oakland Athletics | 33 | 62 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2012 | Oakland Athletics | 34 | 75 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | .000 | .000 | .000 | .000 | .000 | 100.0% | 0.0% | — |
| 2013 | Oakland Athletics | 35 | 65 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2014 | Tampa Bay Rays | 36 | 65 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
| 2015 | Tampa Bay Rays | 37 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | .000 | — | — | — | — |
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Stats from the MLB Stats API, through Oct 9, 2026.