He accepted a football scholarship from Purdue University. He became a starter as a sophomore, finishing fourth in the conference with 132 tackles (89 solo).
As a junior, he was second in the conference with 140 tackles (80 solo). As a senior, he led the conference in tackles with 130, earning All-Big Ten honors. He appeared in the Blue-Gray Game.
He was a three-year starter and would lead the team in tackles for three straight years. He finished his college career in second place in school history in total tackles (479) and first place in solo tackles (321); he also led the Boilermakers in tackles in 3 straight seasons (1985–87).
In 1989, he suffered a right knee injury early in training camp, missing all of the preseason and the season opener. He still was able to become a starter at inside linebacker, registering 63 tackles (fifth on the team), 2 sacks, 2 interceptions and 6 passes defensed. He missed 3 games with an ankle injury he suffered in the sixth game against the Buffalo Bills. He had 10 tackles and 2 interceptions in the season finale against the New England Patriots.
In 1990, the Rams took advantage of his versatility as a player, creating a position called "nose linebacker", that rushed the quarterback, dropped back in coverage and took on offensive lineman in the running game.[2] On October 15, he was placed on the injured reserve list with a fractured left fibula.[3] He was fourth on the team with 25 tackles at the time.
In 1991, he made 29 tackles (23 solo), one sack, 2 passes defensed and one forced fumble. He missed 2 games after suffering a sprained knee in the second game against the New York Giants.
On May 7, 1993, he was signed as a free agent by the Minnesota Vikings.[4] He finished with 15 starts at weakside linebacker, 137 tackles (second on the team) and 4 fumble recoveries (tied for second on the league), on a defense that was ranked number 1 in the league.[5]
The next year he had 72 tackles. He missed 2 games after suffering a sprained left medial collateral ligament in the fourteenth game against the Cleveland Browns.
In 1997, he was limited with injuries, but still tallied 132 tackles (fourth on the team) and 2 fumble recoveries (tied for the team lead). In 1998, he registered 117 tackles (third on the team). On February 11, 1999, he was released after the team decided to start third year player Randall Godfrey.[8]
Strickland played 12 seasons in the NFL; appearing in 161 games (111 starts) and finishing with 580 tackles, 8.5 sacks, 4 interceptions and 11 fumble recoveries.