[1] He was present in school when a shooting took place there; he hid in a cupboard with other students until police officers rescued them.

[5] He made his collegiate debut against Kent State and had a single reception for a 39-yard touchdown from quarterback Bryan Cupito.

[11] On October 20, he threw a 20-yard touchdown pass to Ralph Spry in a loss to North Dakota State.

[18] After the following week's game against Ohio State where Minnesota suffered their first setback of the season, Decker had 13 receptions for 190 receiving yards against Indiana.

[23] In early spring 2009, Decker met with Thomas Goudy, a wide-out coach in St. Louis, Missouri.

[24][25][26] Sports Illustrated columnist Stewart Mandel declared Decker the third-best wide receiver in college football, behind Oklahoma State's Dez Bryant and Georgia's A. J.

[28][29] On October 27, 2009, it was announced that Decker would miss the rest of the season after suffering a sprained foot against Ohio State.

[33] Decker's senior season was cut short due to surgery he underwent to repair torn ligaments in his left foot.

Toward the end of the season, the Broncos started to mix Decker into the offense more, after fellow rookie Demaryius Thomas went down with an injury.

During a Week 1 Monday Night Football matchup at home against the Oakland Raiders, Decker returned a fourth quarter punt for a 90-yard touchdown, but the Broncos lost 23–20.

[44] In Week 2, making his first professional start, Decker caught five passes for 113 yards and two touchdowns, the second on a 52-yard catch in the fourth quarter as Denver recorded their first win of the 2011 season, 24–22 over the Cincinnati Bengals.

[45] On September 25, in Denver's Week 3 17–14 loss to the Tennessee Titans, Decker had a career-high seven catches for 48 yards.

[47] On November 13, in a Week 10 divisional road game at Arrowhead Stadium against the division-rival Kansas City Chiefs, starting quarterback Tim Tebow attempted a pair of deep passes for Decker, the first almost being hauled in off a deflection and the other being knocked down by the defender, but in the fourth quarter, with Denver hanging on to a slim 10–7 lead, Tebow hit Decker on a go route deep for a 56-yard touchdown catch, Decker's only catch of the game and only Tebow's second completion, as the Broncos won 17–10 to move into a second-place tie in the AFC West with the San Diego Chargers and Chiefs.

[50] Heading into the 2012 regular season, Decker seemed primed to have a productive year with veteran quarterback Peyton Manning running Denver's offense.

[52] In April, Decker attended a Colorado Rockies' baseball game with Manning[53] and began workouts with him prior to training camp.

[56] In Weeks 16–17, he recorded back-to-back games with two receiving touchdowns against the Cleveland Browns and Kansas City Chiefs.

Decker was held to one reception for six yards in the Super Bowl due to tight coverage by the Seahawks' defensive backs.

[79] On September 16, Decker was fined $9,115 for a late hit he made on cornerback Josh Shaw on opening day against the Cincinnati Bengals.

[82] On June 6, 2017, the Jets informed Decker that he would be either traded or released by the end of that week, effectively cutting ties with him.

[87] During Week 9, Decker caught his only touchdown of the regular season on an 11-yard pass from Marcus Mariota in a 23–20 victory over the Baltimore Ravens.

[89] In the postseason, Decker caught the game-winning touchdown from Mariota in the Wild Card Round against the Kansas City Chiefs to win on the road 22–21.

[92] With the move, Decker reunited with Josh McDaniels, the Patriots offensive coordinator and former head coach of the Denver Broncos.