Joe Kay/AP on BostonGlobe.com

Milwaukee Brewers first baseman Prince Fielder had to be restrained by his teammates in the Brewer dugout on Monday night after attacking another teammate, pitcher Manny Parra. The left-handed Parra, who had given up six runs in six innings, was visibly upset as he headed for the clubhouse after being replaced by pinch-hitter Russell Branyan. Fielder and Parra enjoyed a brief but lively verbal exchange before Fielder decided to emphasize his point with a of hard slap.  There was a split second after the first crack where reason almost seemed to be regaining control of Fielder.  In the end it was to be testosterone’s day, however, as fielder laid a a second smack on Parra before being restrained by his teammates.   

The best video Dark Side could find is located over at MLB.com.  Check it out here, not because you love seeing pitchers get knocked around of course, but because you want to know how not to react when the the mailroom kid on your company softball team gives up a dinger in the bottom of the eighth.

For more on this story, visit the Boston Globe.