May 7 (UPI) -- Chicago Cubs pitcher Matthew Boyd underwent left knee surgery and is expected to miss six weeks, manager Craig Counsell announced Thursday.
The Cubs placed Boyd on the 15‑day injured list Wednesday with a meniscus injury. To fill the roster spot, they selected pitcher Trent Thornton from Triple‑A Iowa and designated pitcher Charlie Barnes for assignment.
On Thursday, Chicago recalled pitcher Gavin Hollowell from Triple‑A and designated pitcher Corbin Martin for assignment.
"It's minor meniscus surgery," Cubs manager Craig Counsell told reporters. "We know he's going to miss a month or six weeks -- probably closer to six weeks with getting him ramped back up. That's what we are hopeful for. Obviously, we'll see how it all goes.
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