But the incident wasn't as serious as initially perceived.
Farnsworth's knees banged together after he'd fielded a comebacker off the bat of his first Astros hitter, Anderson Hernandez, and the right-hander was immediately taken out of the game for precautionary reasons. Four days earlier, the 34-year-old had hyperextended his left knee while facing the Yankees, and Maddon wasn't taking any chances.
"Two times, I just wanted to be more cautious," Maddon said.
Farnsworth compared the incident with hitting his funny bone and said that he could have stayed in the game if needed. Now he'll regroup and look to make a previously scheduled appearance against the Pirates on Friday.
Farnsworth, who wound up recording the out, has a 3.38 ERA in eight innings this spring.