Kolar suffered a broken arm during Monday's game against the Chargers, Tom Pelissero of NFL Network reports.
Kolar hauled in his lone target for a 14-yard gain while playing 21 of the Ravens' 59 offensive snaps in Monday's 41-31 win over the Buccaneers.
Kolar was not targeted on 22 snaps Sunday against the Commanders.
Kolar (toe) was a full practice participant Thursday.
Kolar (toe) was a limited participant in practice Wednesday.
Kolar had three catches for 64 yards and a touchdown on four targets Sunday against the Bengals.
Kolar was not targeted on 18 snaps against the Bills on Sunday night.
Kolar played a season-high 26 snaps Sunday against the Cowboys and recorded a 30-yard reception.
Kolar finished the regular season with seven catches for 87 yards and a touchdown on nine targets.
Kolar caught his lone target for a 19-yard touchdown in Sunday's blowout win over the Dolphins