The Bears didn't have their top pass-rusher, OLB Pernell McPhee, on Saturday. Mike DiNovo USA TODAY Sports

The Chicago Bears were undermanned upon arrival for their matchup with the St. Louis Rams on Sunday.

Three of the team's biggest contributors -- running back Matt Forte, wide receiver Eddie Royal and outside linebakcer Pernell McPhee -- did not even make the short trip to St. Louis. ESPN's Adam Schefter was the first to report the news, and the team confirmed his report shortly thereafter (h/t Rich Campbell of the Chicago Tribune).

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Forte is the team's leading rusher with 548 yards on the season, but rookie running back Jeremy Langford has been an effective fill-in. The Bears aren't as lucky when it comes to Royal and McPhee, since the roster is short on veteran pass-catchers and elite pass-rushers.

All three players are dealing with knee injuries.

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