"What goes into it is he hits left-handers at an alarming rate," Baker said. "He's caught Latos all the time. He's probably not tired, because he's mixed [playing] time with everybody. He's  years old. He's not worn out."
Mesoraco entered the night batting .339 vs. left-handed pitchers and .219 against right-handers.
Baker did not ask Mesoraco how he felt before deciding to start him.
"Sometimes I ask them," Baker said. "Or, I watch how they get around. I've got a pretty good idea. If I see a guy walking in like Fred Sanford, I know he's sore."
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.