He played college football at Middle Tennessee State and was selected by the Dallas Cowboys in the sixth round of the 2008 NFL draft.

He was also a member of the Kansas City Chiefs, Miami Dolphins, Green Bay Packers, Indianapolis Colts, Tennessee Titans, and Seattle Seahawks.

[1] Walden was injured most of his senior season, which limited his effectiveness, but was still named All-Sun Belt, after finishing second in conference history in career sacks.

Walden was signed as a free agent by the Green Bay Packers on October 27, 2010, because they were experiencing several injuries on the defensive side.

In just his second career start he had a breakout game and was named NFC Defensive Player of the week, after playing against the Chicago Bears, while leading the team with 16 tackles and 2 sacks.

[3] He was declared inactive in Super Bowl XLV because of an ankle injury, although he made an impact in each of the first three games of the Packers' championship run, including a forced fumble, two quarterback hits and nine tackles.

[4][5] In Week 11 against the Tennessee Titans, he pulled Delanie Walker's helmet off and head-butted him, which resulted in a penalty for unnecessary roughness and a one-game suspension.

The next year, he started 15 games at outside linebacker, posting 57 tackles (9 for loss), 3 sacks, one forced fumble and 12 quarterback hits.

In 2016, Walden started 16 games at outside linebacker and had a career year, setting a new career-high in sacks with 11, while making 42 tackles (9 for loss), 3 forced fumbles and 17 quarterback hits.

Police stated they had enough evidence to hold him under felony charges through Monday, as his case could not be processed over the Thanksgiving weekend.