Andrew Luck had surgery on his throwing shoulder in January and has missed the entire preseason.
Tolzien’s in his second season with the Colts. He spent 2013-’15 with the Packers after starting his career with a two-year stint with the 49ers.
He has three career starts- 2 games with the Packers in 2013 and 1 game last season with the Colts. He’s thrown 2 touchdowns and 7 interceptions in 9 total appearances.
Tolzien threw for 5,164 yards 32 touchdowns in two years as a starter at Wisconsin.