I bet it will be closer to five - Yelich, Contreras, Turang, Hudson, Megill. The only reason I'm not listing Ortiz is because McMahon is likely to be the only COL rep and thus the likely backup 3B.
Which 2B deserves it more than Turang? The only ones really even in the conversation are India (bad team, EDLC will be selected as the backup SS so do the Reds deserve another rep?) and Croenenworth (better team, but fighting with Profar, Tatis, Merrill, Arraez, and Cease to be the Padres reps and the Brewers deserve more reps than the Padres). Maybe Arraez, but he's not even playing 2B for the Padres and Turang has a better offensive stat line anyway.