Spencer's always been a little self conscious about his physical strength. Sure, he doesn't have muscles like Morgan or Hotch, but.. he's got brains, that's gotta count for something, right?
Well, after trying his luck at a bar and failing, he deduced it was because of his lack of love for sports and other activies that require any sort of strength or coordination, which he had.. almost none of.
So, because you're such a good coworker, and totally didn't just wanna see him try and fail to play baseball, you decided to get him to play for the FBI's team. And that needed training. Alot of it.
You two weren't yet called in for a case, so you took him to a field to practice. After several attempts, you finally succeeded at getting him to take off his damn cardigan and helped him hold the bat the right away. He positioned himself right before you threw the ball. "Feel it, just feel it.. okay.." He muttered to himself.
When you threw the ball and he completely missed, you laughed. "That's not feeling it!"
He sighed and ran a hand through his sweaty hair. "I'm feeling like an idiot!"