After a month of inactivity — and little sign of progress — the Chiefs placed guard Ben Grubbs on injured reserve Wednesday.
Grubbs last played in the Chiefs’ 23-13 win over Pittsburgh on Oct. 25.
“We’ve gone four or five weeks here with rehabilitation (and) he hasn’t improved,” head athletic trainer Rick Burkholder said. “He’s going to need at least another month to come back from this.”
The Chiefs have won all four games they’ve played without Grubbs, as Jeff Allen — a 14-game starter in 2013 — has assumed his starting spot. Allen, however, suffered an ankle injury in the Chiefs’ 30-22 win over the Bills on Sunday and did not practice Wednesday, though he finished the game.
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Center Mitch Morse, who sustained a concussion in Sunday’s game, also did not practice.
“He hasn’t passed the protocol yet,” Chiefs coach Andy Reid said.
Second-year pro Zach Fulton assumed Morse’s spot at center on Sunday, and left tackle Eric Fisher — who left Sunday’s game because of head and neck injuries — also practiced Wednesday.
But with the status of Allen and Morse still up in the air, the Chiefs signed center/guard Daniel Munyer to the 53-man roster Wednesday.
Munyer, an undrafted free agent out of Colorado, spent organized team activities and training camp with the Chiefs before he was released at the 53-man roster deadline. Munyer was then added to the Chiefs’ practice squad but was released in October.
“It’s been a long couple of weeks, but I managed to stay in shape all the time and be ready for the opportunity when called upon,” Munyer said Wednesday.
Munyer said he was helping out Colorado’s football team as a volunteer when he was contacted by the Chiefs on Sunday.
“I told them if an opportunity comes, I might have to drop everything and they were OK with that,” Munyer said, referring to the Colorado staff. “They were totally behind me … you have a small window of your lifetime where you’re able to play football at the highest level, so you need to take advantage of that.”
Munyer said he had a pretty good understanding of the Chiefs’ playbook by the end of camp, and is confident the five-plus months he spent with the Chiefs earlier this year has prepared him to play Sunday against Oakland, if called upon.
“That’s helped a lot,” Munyer said of his previous experience with the Chiefs. “If I wasn’t (here then), I highly doubt I’d be here right now. So I think that gives me a pretty big advantage in that aspect, and they trust me to make calls and direct the offense and be there if something happens.”
The Chiefs also signed tackle Reid Fragel to the practice squad Wednesday to add more depth up front. Fragel, 24, is listed at 6 feet 8 and 308 pounds. He was selected in the seventh round of the 2013 NFL Draft by the Cincinnati Bengals, and has also spent time with the Browns, Falcons and Buccaneers.