It looked like something you might see on the first day of Little League tryouts. Because all of their regular first basemen are on the disabled list, the Marlins had four novices take ground balls Friday before batting practice. Because there were not enough first basemen’s mitts to go around, they had to take turns sharing. “We’re just trying to find somebody that cannot get hurt, not hurt anybody else and make a play or two,” said Marlins infield coach Perry Hill, who has his work cut out. “There’s a lot more to it than running over and putting your foot on a white thing.” Catcher Miguel Olivo, outfielder Austin Kearns, middle infielder Chris Valaika and outfielder Chris Coghlan were given a crash course Friday on playing first. Greg Dobbs, meanwhile, received his second start in a row at the position. Coghlan wanted to know if he could use his regular glove. Olivo tried using his catcher’s mitt. “Dobber’s got a couple we can pass around,” Hill said. The Marlins found themselves in a difficult spot after Casey Kotchman was placed on the DL with a hamstring injury. With Logan Morrison and Joe Mahoney already on the DL, the Marlins had no one else on the 40-man roster to step in. They called up catcher Kyle Skipworth from Triple A New Orleans to fill Kotchman’s roster spot. “That’s kind of the situation we’re in,” said manager Mike Redmond. “We’re trying to find somebody. We’re going to throw somebody over there and see how it goes.”