There's numerous tales of prospects who were considered premium trade-bait one season, and after sneaking through the deadline untouched, went on to have incredibly productive big-league careers.
Clay Buchholz, for one, was rumored trade-bait for his first couple of seasons in Boston's farm system. He stuck it out, fought hard and engineered a 17-win season last year. Buchholz wasn't the first, and he certainly won't be the last prospect to turn out well and make this team that considered trading him, glad they didn't pull the trigger.
There were more than a few guys like that on the block this trade season, and for the most part they all ended up staying put. Big names like Julio Teheran, Jason Kipnis and Will Middlebrooks were all rumored to be on the block at one point or another.
Tigers pitcher Jacob Turner was even called up from Double-A straight to the big-leagues in what many thought was an audition for the Rockies, who were looking to load up on a mighty fine pitching prospect in exchange for Ubaldo Jimenez. That turned out to be bollocks, but it very well could have come true had the Tigers been a little more daring.
Almost every team, save for the truly crappy ones (Seattle, Oakland and K.C. to name a few) had a guy or two like that, who they pulled back at the last second and, future permitting, will be thanking their lucky stars they had a change of mind.
I present to you those players.