Opposing defenses have discovered Justin Fields to be almost unbeatable over the past five weeks. Bears QB Justin Fields ruled out

Unfortunately, a left shoulder injury will prevent the Chicago Bears quarterback from playing in Week 12.

Fields will not play for the Bears against the visiting New York Jets on Sunday. For Chicago, Trevor Siemian will get the start.

Fields, who was doubtful going into the game, lost to the Atlanta Falcons in Week 11 after sustaining what he characterized as a separated shoulder with damaged ligaments.

Nathan Peterman, whose promotion on Saturday suggested Fields wouldn't be able to attend, will support Siemian.

Fields has amassed an NFL-best 15 offensive touchdowns since Week 7. Fields scored at least one touchdown both throwing and running for five consecutive weeks,

accounting for nine of those scores through the air and six on the ground. According to NFL Research, that run is tied with Kyler Murray's for the longest one since 1950.

Siemian, who signed a contract with the Bears in the offseason, will make his first start with the team in Fields' absence. 

The seasoned backup quarterback has only played in one game so far this year, a 49-29 loss to the Dallas Cowboys in Week 8 where he completed one pass out of five attempts for five yards.

The workload for Bears running back David Montgomery will probably increase, but with Fields and Khalil Herbert both out