It appears Diamondbacks outfielder Yasmany Tomas’ season has come https://www.diamondbacksedges.com/arizona-diamondbacks/paul-goldschmidt-jersey to a close.Out since June 2, Tomas had been struggling to fight off a core muscle injury. The Diamondbacks announced Monday that he will undergo surgery Tuesday to try and correct the problem.#Dbacks outfielder Yasmany Toms will undergo surgery to repair a core injury tomorrow in Philadelphia. Arizona Diamondbacks (@Dbacks) August 21, 2017 The team also announcedthere is no timetable for Tomas’ return.After a https://www.diamondbacksedges.com/arizona-diamondbacks/yasmany-tomas-jersey promising 2016 campaign, Tomas struggled to get things going this year. He was hitting just .241 with eight home runs and 32 RBIs before his injury.Arizona traded for J.D. Martinez earlier this summer. The former Tigers slugger has nine home runs and 21RBIs in 27 games with the Diamondbacks. But Martinez will become https://www.diamondbacksedges.com/arizona-diamondbacks/archie-bradley-jersey a free agent this offseason, po sibly opening a starting spot back up for Tomas should he recover in time for next season.After looking to be a virtual lock to make the postseason a couple weeks ago, Arizona, whohas lost three straight games, now holds just a 2 1/2-game lead overthe Brewers for the final wild-card spot.