PHOENIX -- Chad Tracy's last swing of his best game of the season came with a price: a strained oblique muscle, which has landed the infielder on the 15-day disabled list.
The D-backs made the move prior to Saturday's nationally-televised game against Atlanta.
Josh Whitesell, recalled from Triple-A Reno to take Tracy's place on the roster, was expected to arrive at Chase Field by the 1:10 p.m. MST first pitch.
Tracy appeared to tweak the ribcage muscle on an opposite-single in the eighth inning of Friday night's game.
"When he got to first base, I saw him grimace from it," said manager A.J. Hinch, who took Tracy out of the game in the top of the ninth of the D-backs' 10-6 loss.
Earlier in Friday night's game, Tracy had singled for a run in the second and lined a three-run homer in the fourth. The big night raised his average to .203, with four homers and 17 RBIs.
Hinch called the untimely injury "very unfortunate" for Tracy. The club had to make a quick decision on disabling him. Carrying 13 pitchers, the D-backs could not afford to be left short in position players.
Whitesell spent two weeks earlier this month with the D-backs, going 3-for-26 in nine games at first base.
Veteran first baseman Tony Clark, on the DL since May 6 with a sprained ligament in his right hand, is not yet close to a return. The earliest he figures to be activated is when the D-backs come off their next road trip, on June 9.
Tom Singer is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.