Record: 71-91, -130 Run Differential
Summary: I'll be honest. I've not been looking forward to this one. Too many of the best writers out there (Dave Cameron, Jeff Sullivan) are Mariners guys, and I pale in comparison in terms of knowing the team, writing talent and analytical talent... soooo everything! But here we are. The 2013 Mariners were not very good. In fact, they were a pretty bad team. By Run Differential, they were only a hair less bad than Miami. The sad thing about this is that this was supposedly an actual attempt to have a winning ballclub rather than just another rebuilding year. So yeah, that didn't go well.