ST. PETERSBURG -- Royals reliever Kyle Farnsworth, whose injury rehab assignment with Triple-A Omaha was interrupted by groin tightness, threw in the bullpen on Sunday at Tropicana Field.

"He felt good," manager Trey Hillman said. "He started to fatigue, which is normal, but the tightness didn't come back, which is good."

"He'll stay with us for a couple of days, go back to Kansas City. He'll probably do another bullpen [session] just to be safe before we send him back out."

Farnsworth went on the disabled list June 26 with a right groin strain. He's 1-4 with a 4.24 ERA in 27 games.

Outfielder Josh Anderson, acquired from Detroit Thursday, still had not reported as he and his wife await the birth of their first child.

"I haven't heard a word," Hillman said, adding that he planned to call Anderson after Sunday's game.