UPDATE - 4:05 p.m. ET.: Manager Chad Tracy told reporters following the 4-3 win that Gasper was heading to get an MRI on his right bicep, describing the 30-year-old as being in "some pretty good discomfort."

Not a lot has gone right for the Boston Red Sox in the final month of the regular season, as the Red Sox offense has gone ice cold thanks in part to an inability to cash in on chances with runners in scoring position and a string of injuries to a number of crucial offensive pieces. With just five days until the postseason begins, the injuries kept coming for Boston as one of the team's best hitters over the last month, utility man Mickey Gasper, left game one of Friday's doubleheader against the Chicago Cubs with an apparent injury. 

Here's what you need to know: 

With the Cubs leading 3-1 in the bottom of the fifth inning, Gasper, who was serving as the catcher, stepped to the plate for his third plate appearance of the afternoon against Chicago starter Clay Holmes, with runners on second and third and nobody out. After working the count full, Holmes got Gasper to lunge at a good sweeper well below the zone for the first out of the inning. However, after finishing his follow-through, Gasper was seen wincing in pain and flexing his right arm as he walked back to the Boston dugout. Upon his return, NESN cameras caught Gasper working with trainers on his right bicep. 

Boston tied the game at three thanks to a two-RBI single off the bat of designated hitter Adley Rutschman; however, when the team took the field for the top of the sixth inning, it was Connor Wong who was behind the plate, replacing the injured Gasper. 

Since his return to Boston on Aug. 17, few hitters in baseball have been hotter than Gasper, who has hit .272/.427/.691/1.118 with 10 home runs, ranking in the top five among 223 hitters with at least 90 plate appearances in slugging percentage (3rd) and weighted runs created plus (204, 2nd). 

A serious injury to Gasper is the last thing the struggling Boston offense needs, as he was set to see an expanded role in the postseason, which begins on Tuesday. The 30-year-old was expected to serve as the starting designated hitter against right-handed pitching or the starting first baseman if All-Star slugger Willson Contreras, who cast doubt on his postseason availability in an emotional press conference Thursday night due to a right-hand injury, is unable to play. 

We'll have more on Gasper's condition at the conclusion of game one of Friday's doubleheader.