Carlos Quentin undergoes second knee surgery in the past seven months

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Bill Center of the San Diego Union-Tribune reports that Carlos Quentin underwent arthroscopic surgery on his right knee yesterday.

This is the same knee that Quentin had surgery on back in March and caused him to miss the first 49 games of the season. He ended up hitting .261/.374/.504 with 16 home runs, 46 RBI and an .877 OPS in 340 plate appearances, but didn’t start 22 out of the final 26 games of the season due to continued pain in the knee.

The good news is that Quentin will be able to participate in offseason workouts and should be ready for the start of spring training, but his injury history is reason for concern. He signed a three-year, $27 million extension with the Padres in July which will pay him $9.5 million in each of the next two seasons and $8 million in 2015. He’ll get at least a $3 million buyout on a $10 million mutual option for 2016 if he plays 320 games over the next three years. Quentin turned 30 years old in August and has never played more than 131 games in a season, so the Padres may not have to worry about that.

Ketel Marte shut down with back injury

Ketel Marte
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With just over a week left in the regular season, the Diamondbacks have elected to shut down infielder/outfielder Ketel Marte. Marte has been dealing with some lower back inflammation and stiffness over the last few days; on Friday, the team revealed that he was diagnosed with a stress reaction as well.

It doesn’t look as though the injury will compromise Marte’s 2020 campaign, but as Craig noted on Wednesday, his absence will likely have some effect on his NL MVP candidacy. The 25-year-old will wrap his first All-Star season with a .329/.389/.592 batting line, 32 home runs, a .981 OPS, and a staggering, career-best 7.1 fWAR through 628 plate appearances.

Marte told reporters Thursday that the back pain had been an issue “for the past two months,” though he didn’t comment on the severity of the injury. Despite his ability to play through the pain since July, the issue has clearly escalated in the last week or so. Although the loss of their most valuable contributor may have a negative impact on the D-backs’ chances of competing in the postseason, it’s undeniably a wise move to let Marte recuperate rather than pushing him to play for another week and running the risk of further injury.

Entering Friday’s series against the Padres — their last road series of the regular season — Arizona still has a sizable gap to close in order to earn one of two NL wild card spots. They’re five games out of postseason contention, with the Nationals, Brewers, Cubs, Mets, and Phillies ahead of them.