Trumbo felt pain in the area while hitting in the cage prior to Sunday's game against the Rays, but played through it and indicated that sitting out on Monday was only a precautionary measure. He took part in batting practice, is available to pinch-hit and will probably start at designated hitter on Tuesday.
Hours before the game, though, Trumbo said the area feels "extremely tight" and "like a knot." So, manager Mike Scioscia decided to sit him for the first time since May 10.
"It's a tough thing," Trumbo said about not starting against a Rangers team his Angels are chasing. "I want to be in there every day, and I feel like I can go every day and I feel like I can go today. But sometimes what you feel and what's smart is not always in line."
Trumbo, who had the injured area wrapped postgame Sunday, leads the Angels in homers (27) and RBIs (69) while batting .304 with a .354 on-base percentage.
"He's a little sore," Scioscia said, "but it looks like he's going in the right direction from where it was."