Montgomery rushed 21 times for 91 yards and a touchdown while posting eight receptions for 51 yards in the Bears' 33-22 loss to the Cardinals on Sunday.
With the Arizona pass rush giving Andy Dalton very little time to throw, Montgomery led the Bears with nine targets, and he was effective as both a runner and receiver in a tough matchup. After failing to surpass 80 total yards while not scoring over his last three games, he recorded his highest yardage total of the season, and his weekly volume ensures he'll be a top-20 running back the rest of the way.
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The Bears activated Fields (illness) from the reserve/COVID-19 list Thursday, Adam Hoge of NBC Sports Chicago reports.
Nall was inactive for the Bears' 31-17 Week 18 loss to the Vikings, and he ended the season with one rush for four yards and a four-yard reception.
Robinson caught two passes for 22 yards in the Bears' 31-17 Week 18 loss to the Vikings, and he ended the season with 38 receptions for 410 yards and one touchdown in 13 games.
Kmet caught four passes for 48 yards in the Bears' 31-17 Week 18 loss to the Vikings, and he ended the season with 60 receptions for 612 yards.
Dalton completed 33 of 48 passes for 325 yards, a touchdown and two interceptions and rushed once for seven yards in the Bears' 31-17 Week 18 loss to the Vikings. He ended the season with 1,515 passing yards, eight touchdown passes and nine interceptions over eight games.
Mooney caught 12 passes for 126 yards in the Bears' 31-17 Week 18 loss to the Vikings, and he ended the season with 81 receptions 1,054 yards and four touchdowns.
Montgomery rushed 20 times for 72 yards and brought in two of three targets for seven yards in the Bears' 31-17 Week 18 loss to the Vikings. He ended the season with 225 carries for 849 yards and seven touchdowns in addition to 42 receptions for 301 yards.
Fields remains on the reserve/COVID-19 list in advance of Sunday's game against the Vikings, Larry Mayer of the Bears' official site reports.
Dalton will start Sunday's game in Minnesota, Kevin Fishbain of The Athletic reports.
Dalton is expected to make a second straight start in Sunday's season finale at Minnesota after the Bears placed Justin Fields (illness) on the reserve/COVID-19 list Thursday, Jason Lieser of the Chicago Sun-Times reports.