In 370 total MLB games, his career statistics include a 30–43 record, with a 4.30 earned run average (ERA), 395 strikeouts, and 624 innings pitched.

[5] In June 1973, Farmer was traded to the Detroit Tigers, in exchange for pitcher Tom Timmermann and infielder Kevin Collins.

[1] In March 1974, Farmer was part of a multi-team trade that sent him to the New York Yankees; they then sold his contract to the Philadelphia Phillies, before he played a game for them.

[6] To this point in his career, Farmer had appeared in 143 MLB games, registering a 12–12 record, with a 5.05 ERA, 14 saves, and 139 strikeouts, in 233+1⁄3 innings pitched.

[4] After the season, the Brewers traded Farmer and first baseman Gary Holle to the Texas Rangers in exchange for pitcher Reggie Cleveland.

On May 8, a Farmer pitch thrown in the top of the fifth inning fractured Cowens' jaw and broke several teeth,[7] causing him to miss 21 games.

[8] Farmer later said that Cowens had attempted to steal signs from the catcher and thought the pitch would be a breaking ball away, but it was actually an inside fastball.

[11] While Farmer watched his infielders make the play, Cowens ran to the mound rather than first base, and tackled the pitcher from behind, landing several punches before the benches cleared and the two were separated.

[12] Later, Farmer agreed to drop the charges in exchange for a handshake‚ and the two players brought out the lineup cards before a game in Detroit on September 1, and shook hands.

He faced three batters, recording the final two outs of the sixth inning when he got Pete Rose to ground into a double play.

[3] In his three seasons with the White Sox, Farmer appeared in 148 games and notched 54 saves while striking out 144 batters in 233+2⁄3 innings pitched, with a 3.31 ERA.

[20] In 2006, he took over play-by-play from John Rooney, and served in that role through the 2019 season, with broadcast partners Chris Singleton (2006–2007), Steve Stone (2008), and Darrin Jackson (2009–2019).