ENGLEWOOD, Colo. — As Denver deals with several injuries across its roster, guard/center Austin Schlottmann and inside linebacker Curtis Robinson will be elevated from the practice squad to the game-day roster ahead of Sunday's game against the Ravens, the Broncos announced Saturday.

Schlottmann, a third-year lineman out of TCU, has appeared in 33 games in his career with the Broncos, including six starts. He has been elevated once previously this season for Denver's Week 2 game against the Jaguars, as starter Graham Glasgow missed the game due to an irregular heartbeat.

Glasgow will again be sidelined on Sunday, as the team ruled him out with a knee injury that he suffered midway through Denver's Week 3 win. Head Coach Vic Fangio said that second-year player Netane Muti will start in Glasgow's place.

Denver could also be without starting left guard Dalton Risner, who is recovering from an ankle injury. Risner, who missed practice on Wednesday and Thursday but returned in a limited capacity on Friday, is listed as questionable.

Robinson has yet to make his first regular-season NFL appearance. The undrafted rookie out of Stanford made five total defensive tackles and one special-teams tackle in preseason action. During his college career at Stanford, Robinson was twice named an All-Pac-12 honorable mention by the conference's coaches.

In recent weeks, the Broncos have relied on their depth at inside linebacker. After placing Josey Jewell on injured reserve with a pectoral injury on Sept. 21, Denver started 2020 draft pick Justin Strnad in his stead. Rookie reserve linebacker Baron Browning also received a handful of defensive snaps and several special-teams snaps in Week 3 against the Jets, but his status for Week 4 is questionable due to a back injury that sidelined him from Friday's practice.