Players who played for the Athletics and Colorado Rockies
61 players
61 players have played for both the Athletics and the Colorado Rockies. Jason Giambi spent the most seasons with the two: 8 with the Athletics and 4 with the Colorado Rockies. On a roster now: Vimael Machin, Brian Serven, Geoff Hartlieb, and Rico Garcia. Every season since 1876 is on file.
| Player | Pos | ATH | COL |
|---|---|---|---|
| Jason Giambi | DH | 1995–2009 · 8 seasons | 2009–2012 · 4 seasons |
| Carlos Gonzalez | RF | 2008 · 1 season | 2009–2018 · 10 seasons |
| Mark Ellis | 2B | 2002–2011 · 9 seasons | 2011 · 1 season |
| Walt Weiss | SS | 1987–1992 · 6 seasons | 1994–1997 · 4 seasons |
| Jeff Francis | RP | 2014 · 1 season | 2004–2013 · 8 seasons |
| Brian Fuentes | RP | 2011–2012 · 2 seasons | 2002–2008 · 7 seasons |
| Brett Anderson | SP | 2009–2019 · 7 seasons | 2014 · 1 season |
| Matt Holliday | OF | 2009 · 1 season | 2004–2018 · 6 seasons |
| Seth Smith | RF | 2012–2013 · 2 seasons | 2007–2011 · 5 seasons |
| Huston Street | RP | 2005–2008 · 4 seasons | 2009–2011 · 3 seasons |
| Adam Melhuse | C | 2003–2007 · 5 seasons | 2001–2008 · 2 seasons |
| Jay Witasick | RP | 1996–2007 · 6 seasons | 2005 · 1 season |
| Eric Byrnes | LF | 2000–2005 · 6 seasons | 2005 · 1 season |
| Ramon Hernandez | C | 1999–2003 · 5 seasons | 2012 · 1 season |
| Drew Pomeranz | RP | 2014–2015 · 2 seasons | 2011–2013 · 3 seasons |
| Josh Outman | RP | 2008–2011 · 3 seasons | 2012–2013 · 2 seasons |
| Marco Scutaro | 2B | 2004–2007 · 4 seasons | 2012 · 1 season |
| Jack Cust | LF | 2007–2010 · 4 seasons | 2002 · 1 season |
| Joe Kennedy | SP | 2005–2007 · 3 seasons | 2004–2005 · 2 seasons |
| Mark Bellhorn | 3B | 1997–2001 · 4 seasons | 2003 · 1 season |
| Vimael Machin | SS | 2020–2022 · 3 seasons | 2026 · 1 season |
| Matt McBride | C | 2016 · 1 season | 2012–2015 · 3 seasons |
| Jason Hammel | SP | 2014 · 1 season | 2009–2011 · 3 seasons |
| Jay Payton | LF | 2005–2006 · 2 seasons | 2003–2010 · 2 seasons |
| Luis Vizcaino | RP | 1999–2001 · 3 seasons | 2008 · 1 season |
| Brian Serven | C | 2026 · 1 season | 2022–2023 · 2 seasons |
| Nick Martini | RF | 2018–2019 · 2 seasons | 2025 · 1 season |
| Fernando Abad | RP | 2014–2015 · 2 seasons | 2023 · 1 season |
| Nick Hundley | C | 2019 · 1 season | 2015–2016 · 2 seasons |
| Yonder Alonso | 1B | 2016–2017 · 2 seasons | 2019 · 1 season |
| John Axford | RP | 2016–2017 · 2 seasons | 2015 · 1 season |
| Pat Neshek | RP | 2012–2013 · 2 seasons | 2017 · 1 season |
| Clayton Mortensen | SP | 2009–2010 · 2 seasons | 2011 · 1 season |
| Kevin Kouzmanoff | 3B | 2010–2011 · 2 seasons | 2011 · 1 season |
| Octavio Dotel | RP | 2004–2005 · 2 seasons | 2010 · 1 season |
| Alan Embree | RP | 2007–2008 · 2 seasons | 2009 · 1 season |
| Mark Redman | SP | 2004 · 1 season | 2007–2008 · 2 seasons |
| Micah Bowie | RP | 2002–2003 · 2 seasons | 2008 · 1 season |
| Kevin Jarvis | RP | 1999 · 1 season | 2000–2004 · 2 seasons |
| Bobby Chouinard | RP | 1996 · 1 season | 2000–2001 · 2 seasons |
| Mike Kingery | CF | 1992 · 1 season | 1994–1995 · 2 seasons |
| Bruce Walton | RP | 1991–1992 · 2 seasons | 1994 · 1 season |
| Geoff Hartlieb | RP | 2026 · 1 season | 2024 · 1 season |
| Scott Alexander | RP | 2024 · 1 season | 2025 · 1 season |
| Jurickson Profar | LF | 2019 · 1 season | 2023 · 1 season |
| Rico Garcia | RP | 2023 · 1 season | 2019 · 1 season |
| Jonathan Lucroy | C | 2018 · 1 season | 2017 · 1 season |
| Simon Castro | SP | 2017 · 1 season | 2015 · 1 season |
| Jason Pridie | CF | 2015 · 1 season | 2014 · 1 season |
| Guillermo Moscoso | RP | 2011 · 1 season | 2012 · 1 season |
| Jim Miller | RP | 2012 · 1 season | 2011 · 1 season |
| Bruce Billings | RP | 2011 · 1 season | 2011 · 1 season |
| Edgar G Gonzalez | RP | 2009 · 1 season | 2011 · 1 season |
| Cedrick Bowers | RP | 2010 · 1 season | 2008 · 1 season |
| Greg Smith | SP | 2008 · 1 season | 2010 · 1 season |
| Matt Murton | LF | 2008 · 1 season | 2009 · 1 season |
| Mike Venafro | RP | 2002 · 1 season | 2006 · 1 season |
| Todd Belitz | RP | 2000 · 1 season | 2001 · 1 season |
| Brent Mayne | C | 1997 · 1 season | 2000 · 1 season |
| Kurt Abbott | 2B | 1993 · 1 season | 1999 · 1 season |
| Jeff Parrett | RP | 1992 · 1 season | 1993 · 1 season |
Regular season, under every name each club has played as. A season split by a trade counts for both clubs where the game logs reach it (NBA from 1993-94, NFL 1994, NHL 1996, MLB 2001). Longest stay with the two first.