|Date of birth:March 10, 1963|
|Place of birth: San Francisco, California|
|NFL Draft: 1986 / Round: 3 / Pick: 74|
|No regular season or postseason appearances|
|* Dallas Cowboys ( 1986)|
|Career highlights and awards|
|* Second-team All-American (1985)|
|Stats at pro-football-reference.com|
As a fifth-year senior he was a key part of the seventh-ranked total defense (number 1 in rush defense), that included the play of Ken Norton Jr., Carnell Lake, James Washington, Jim Wahler and Darryl Henley. After finishing the season with 74 tackles (third on the team) and 9 sacks (led the team), he received Pac-10 Defensive Player of the Year, second-team All-American and All-Pac-10 honors.
In his college career, he recorded 185 tackles, 20 sacks and 30 tackles for loss. In 2005, he was inducted into the San Mateo County Sports Hall of Fame.
Walen was selected by the Dallas Cowboys in the third round of the 1986 NFL Draft. As a rookie, he was lost for the year after fracturing a bone in his right ankle, while completing a 1 1/2-mile run on the last day of the Cowboys' rookie orientation in May. The next year he had some few snaps on passing situations.
In 1988, he had his best season when in a reserve role (started only 2 games) he registered 4 sacks (fifth on the team). On September 25, he replaced and ineffective Kevin Brooks against the Atlanta Falcons, making 4 tackles and one sack. On October 30, he started in place of Brooks against the Phoenix Cardinals, registering 9 tackles, 2 sacks and blocked an extra point.
The next season, he emerged as one of the full-time starters on the defensive line at left tackle, but was placed on the injured reserve list after suffering a torn anterior cruciate ligament in his left knee during the second pre-season game against the Los Angeles Raiders.
- "True Grit on Ground : Walen Anchors UCLA's Ranked Rushing Defense". http://articles.latimes.com/1985-11-06/sports/sp-4753_1_ucla-defensive. Retrieved April 30, 2017.
- "Donahue and Walen Win Honors in Pacific 10 Conference". http://articles.latimes.com/1985-11-27/sports/sp-4777_1_terry-donahue. Retrieved April 30, 2017.
- "Names in the News". http://articles.latimes.com/1986-05-20/sports/sp-6836_1_dallas-cowboys-rookie. Retrieved April 30, 2017.
- "Denver To Showcase Rookies". https://news.google.com/newspapers?nid=861&dat=19890826&id=XDdSAAAAIBAJ&sjid=UzYNAAAAIBAJ&pg=5097,5275052. Retrieved April 30, 2017.
- "Walen leaves Dallas after position change". https://news.google.com/newspapers?nid=2199&dat=19900822&id=YC4yAAAAIBAJ&sjid=s-UFAAAAIBAJ&pg=2920,2740138. Retrieved April 30, 2017.