There is the 2010 Cleveland Indians, who debuted top prospect Carlos Santana that year, and never carried more than two catchers all year, despite having Chris Gimenez available in AAA (a Chris Herrmann clone who played C and OF) as a possible emergency/third catcher. In Cleveland's 46 games with Santana active, Santana started 40 games at catcher, 5 games at DH, and sat 1 game, but entered that game as PH. There is the 2012 Seattle Mariners, who debuted top prospect Jesus Montero full time (acquired from Yankees). Seattle carried three catchers all season in 2012 and all three of those catchers also got significant DH time. Montero, John Jaso, Miguel Olivo. Matt Wieters had 10 games DH when he debuted in 2009, someone could look that one up.