Wins and losses don't really matter when judging pitchers, but Matt Garza has a chance to reach a difficult feat.
Every now and then when I'm bored or have nothing else to do, I'll sometimes surf around Baseball Reference and see if anything interesting pops up. The other day I was looking in their 'frivolities' section, and noticed they had a list of 20-game losers.
It's something that doesn't happen to often, as you might expect. The last pitcher to lose 20 games was Mike Maroth in 2003. Before that, you'd have to go all the way back to 1980 to start finding 20-game losers.