Umpire C.B. Bucknor declined to shake St. Louis Cardinals manager Oliver Marmol's hand before an exhibition game here Saturday, according to Marmol, and Major League Baseball is looking into that exchange.

Marmol was upset by Bucknor's response Saturday.

"I don't think he's good at his job, and it just shows a lack of class as a man," Marmol said after the game.

According to an MLB spokesperson, "We are aware of Mr. Marmol's comments, and the matter is under review."