- Number: 46
- Position: Linebacker
- Height: 6-2
- Weight: 240
- Roster Years: 2005-2007
- Hometown: Evanston, WY
- Last School: Utah State
Born in Evanston, Wyoming. He is the son of Dennis and Vicki Poppinga. Kelly has three sisters and two brothers. His brother, Casey was a starting tight end for Utah State who enjoyed a career in the NFL playing for the Pittsburgh Steelers, Seattle Seahawks, Kansas City Chiefs and 2004 NFC Champions Philadelphia Eagles. His other brother, Brady, was an All-MWC performer at BYU and currently plays for the Green Bay Packers. He served a mission for The Church of Jesus Christ of Latter-day Saints to Guayaquil, Ecuador. His wife's name is Rebekah.
Was a first-team all-state selection as a senior after earning second-team all-state honors as a junior ... helped team to the state championship as a sophomore ... played both linebacker and tight end ... also played basketball and competed in track ... was an all-state selection in both of those sports as well, winning the state championship in the discus his senior year (162-10).
Saw action as a backup linebacker as well as on special teams as a true freshman in 2003 ... recorded five tackles on the year, while missing four games in the middle of the season due to an injury ... had one tackle for loss ... recovered a fumble against Nebraska ... ranked third on the Utah State roster with 61 tackles as a sophomore (2004) ... credited with 31 solo tackles ... credited with five tackles for a combined loss of 22 yards ... posted on sack for an eight yard loss.
2005 Redshirt Year
Redshirted the 2005 season after transferring from Utah State
2006 Junior Year
Earned Academic All-Mountain West Conference honors ... played in all 13 games for the Cougars ... credited with 36 tackles, including 15 solo and 21 assisted takedowns ... had 3.5 tackles for a combined loss of 12 yards ... had two sacks for nine yards ... credited with two interceptions ... a significant contributor on a defensive unit that gave up only 14.7 points per game, ranking 10th nationally ... part of a defense that ranked fourth nationally in turnover margin with +14 turnover margin (+1.08 pg).
In 2009 a BYU graduate assistant coach. In 2010 BYU defensive graduate assistant and interim outside linebacker coach. He helped BYU rank No. 24 in total defense in 2010, and helped coach the Cougars to win in the New Mexico Bowl. In 2011 he became BYU's outside linebackers coach