Siemian is a former 7th round pick by the Denver Broncos. He surprised everyone and gained the starting job as soon as in his second year. He played 3 seasons in Denver and he was a pretty solid quarterback.
He signed with the New Orleans Saints last season. He played in 6 games and started 4 of them. Although he didn't win a game, he played actually great. In those 4 starts, he has 1154 passing yards, 11 touchdowns and 3 interceptions.
While quarterback is not the first position that comes to mind when we think of "needs" for the Bears, it's still important. I truly believe Ryan Poles will try to get rid of Nick Foles via trade or even release him. Siemian could be a very serviceable backup to Justin Fields. He would be reliable and he is known for being a great locker room player that gets along with everyone.
Siemian is 6"3 220 pounds. He can move pretty well in the pocket and he has great touch on deep throws. While he something struggles with his accuracy, I love that he is very quick in his decision-making. With a potential weaker offensive line, any quarterback starting for the Bears will have to be able to get rid of the ball quickly.
Here he is connecting a deep ball to former Bears' Kevin White: