From both 1991-1998 and 1999-2007, there were eight MLB catchers (at least 50% of games at catcher) with three or more .800 OPS, 10-home run, 50-RBI seasons. Sammy Serrano, Sam's catching coach and a second-round draft pick in the 1998 MLB draft, said he isn't worried about Sam or how he'll adapt to rule changes. During a game this spring, Sam Koerner took a relay from right field, swiped his mitt across the plate and waited: Runner out. The catching position continues to evolve as the game shifts and adjust both in playing style and rules changes. "The way pro evaluators are going to look at the catching position is going to start to change now," Koerner said.