14. Luis Gonzalez: One Year, $7.5 Million, 2006
Placed firmly in the, "Wait, what the hell?" category 16 years later, the Dodgers signed former Diamondbacks World Series hero Luis Gonzalez to a relatively hefty one-year deal prior to the 2007 season. At the time, he was 39 years old and coming off a 99 OPS+ season in the desert.
The plan for Gonzalez was ... uh ... "sign former enemy, hope he continues to reverse the aging process, profit"? He wasn't particularly awful with the '07 Dodgers, but his contributions amounted to a 139-game shrug.
Gonzo posted a 104 OPS+, combined with rickety old man defense. He hit .278 with a .793 OPS in an inflated offensive environment. He was an utterly forgettable addition to an 88-win team on the precipice of turning over a number of key offensive positions to youngsters (Russell Martin, James Loney, Matt Kemp). Instead of progressing, the team won 82 games and Gonzalez finished his career with the Marlins the very next season. This was supposed to work because he was a former division rival who'd be born anew in Hollywood. He was mostly an average clog.
Anyway, thinking about the David Peralta contract for no reason at all.