Jacob deGrom was hit with Jeff Bagwell Jersey a setback in his return from forearm tightne s, and is now expected to be out for at least another month.According to a report from , deGrom felt additional inflammation in his right arm during a bullpen se sion on Thursday, forcing the Mets to shut down their ace once again for another two weeks.DeGrom is expected to go through another ramp-up proce s once he returns, according to DiComo, but the latter noted it could require two weeks or more, which would make George Springer Jersey a September return the soonest he might come back from the injury.FAGAN: The Mets ace has been experiencing tightne s in his right forearm since July, the latest injury he has faced this season. Manager Luis Rojas told reporters on July 17 that deGrom was scratched from his scheduled start Monday in Cincinnati against the Reds after he felt the tightne s during a bullpen se sion Friday.On July 18, it was reported by Newsday's Tim Healey that deGrom would be placed on the 10-day injured list, noting that he will Jose Altuve Jersey not throw until his forearm tightne s has gone away.Breaking: The Mets are putting Jacob deGrom on the IL.His right forearm is still tight. He wont throw until that goes away. Tim Healey (@timbhealey) Rojas had also told reporters that deGrom underwent an MRI on Friday night, which revealed no structural damage. Rojas had said deGrom would be day-to-day before the team Francisco Liriano Jersey placed him on the IL. His last mound appearance was July 7 Hector Rondon Jersey vs. the Brewers.The All-Star right-hander has been sidelined multiple times this season because of injury:Lat irritation .Right side discomfort forced him to the injured list in mid-May. He mi sed two turns.Flexor tendinitis in his pitching elbow to six innings.Shoulder sorene s .DeGrom, 33, was named to the National League All-Star team this season but did not attend the game in Denver. He he wanted to spend the time with J.R. Richard Jersey his family and "get healthy for the second half."He has been historically good when he has been able to take the mound in 2021. He entered the All-Star break with an MLB-best 1.08 ERA (1.24 FIP) and 13.27 strikeouts per nine innings.