So even though -- ahem -- nature was calling for the reliever, he stayed put and was rewarded for it, as the Yankees rattled off five runs en route to a stunning 6-5 victory over the Rangers in Game 1 of the American League Championship Series.
"I didn't move," Chamberlain said. "I was just going to continue to go with that."
Chamberlain also played a more prominent role in the comeback, holding the fort with a scoreless fifth inning in relief of starter CC Sabathia. Dustin Moseley also hurled two scoreless innings before the rally started.
"We had to keep the team in the game," Chamberlain said. "CC has picked us up so many times before when we've needed rest, and for this to be able to come out and have our bullpen pick him up was awesome."
Chamberlain started the year as the Yankees' primary eighth-inning reliever but was idle for the AL Division Series against the Twins, with Kerry Wood and David Robertson both seeing innings leading up to closer Mariano Rivera.
"I just continued to get my work in," Chamberlain said. "Everybody made a big deal that I didn't pitch, but there have been times that I've gone three games without pitching. You just continue to stay focused."