Justin Upton of the San Diego Padres, right, is congratulated by Will Middlebrooks of the San Diego Padres after he hit a solo home run during the eighth inning of a baseball game against the Arizona Diamondbacks at Petco Park April 15, 2015 in San Diego, California. All Major League Baseball players are wearing #42 today in honor of Jackie Robinson Day. (Photo by Denis Poroy/Getty Images)