Paul Goldschmidt, 5 years, 32.5 million dollar extension plus 14.5 club option
To get a potential future Hall of Famer this cheap on a contract that spanned his arbitration and a couple of free-agent years is amazing. Great job by former GM Kevin Towers for signing him to this deal. During the contract, he accumulated 39.8 WAR, the fourth-most ever by a 1st baseman during the ages of 24-30, only behind Pujols, Todd Helton, and Jeff Bagwell. America's First Baseman was a 2x MVP Runner-up, 6x All-Star, 3 Gold Gloves, 4 Silver Sluggers, and had a 30/20 and 30/30 season! For those of you who don't realize, reaching 20, let alone 30 stolen bases for a first baseman is nearly unheard of.
Furthermore, he hit .301, .406, .541, .947, with a 150 OPS+ (100 is league average) across 899 games. Along the way, he set multiple Diamondbacks records and/or reached the top two. Goldy helped the Dbacks to two playoff appearances, accrued 996 hits, 215 doubles, 181 HRs, 602 RBIs, 102 SBs, 575 walks, and only 876 K's. Of course, this was only during his contract, and not the entire time he made a huge impact in the desert. Either way, this was an amazing deal that he signed with the Diamondbacks.