He attended Sturgeon Bay High School, where he played running back, linebacker and punter on the football field.
[1] Greisen played college football at Wisconsin after being offered a scholarship at a Badger camp before his senior year of high school.
[2] After playing as a backup his freshman and sophomore years, Greisen cracked the starting lineup as a junior and led the Big Ten in tackles.
The move came after Greisen could not put a deal together with the Tennessee Titans and the Jaguars tried unsuccessfully to sign LaVar Arrington.
[10] Greisen's defensive playing time sharply declined in the 2008 season, and the Ravens released him on March 13, 2009, in a move that saved the team $716,000 in salary cap space.
[16] Greisen is married, and obtained an MBA degree from Northwestern University after his playing career ended.