In 2005, Rafael Palmeiro was the starting first baseman for the Baltimore Orioles. His backup was Chris Gomez.
On June 25, 2005, Wes Helms was the starting first baseman for the Milwaukee Brewers. Lyle Overbay played the eighth and ninth inning at first base.
Napoleon Calzado debuted on May 29, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards; he played his final game on June 7, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards.
Alejandro Freire debuted on August 9, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards; he played his final game on October 1, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards.
Keith Reed debuted on May 11, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards; he played his final game on May 18, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards.
Walter Young debuted on September 6, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards; he played his final game on October 2, 2005, playing for the Baltimore Orioles at Oriole Park at Camden Yards.
Sal Fasano played in just one game at first base for the Baltimore Orioles in 2005 and did not start. He played for a total of 6 outs, equivalent to .22 9-inning games. He made no putouts, had no assists, and committed no errors, equivalent to 0 errors per 9-inning game. He had no double plays.
Javy Lopez played in just one game at first base for the Baltimore Orioles in 2005 and did not start. He played for a total of 6 outs, equivalent to .22 9-inning games. He made one putout, had no assists, and committed no errors, equivalent to 0 errors per 9-inning game. He had one double play.
Bernie Castro played in 9 games at designated hitter for the Baltimore Orioles in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Sal Fasano played in 3 games at designated hitter for the Baltimore Orioles in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Alejandro Freire played in 9 games at designated hitter for the Baltimore Orioles in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Jay Gibbons played in 40 games at designated hitter for the Baltimore Orioles in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
Chris Gomez played in 6 games at designated hitter for the Baltimore Orioles in 2005, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).