Coffman had a great high school career receiving passes from his younger brother Carson.

He finished the season with 47 receptions for 503 yards and 4 touchdowns, and earned First-team Freshman All-American honors by Rivals.com.

Because of his play he was a second-team All-Big 12 selection and again was a finalist for the John Mackey Award.

[1] As a senior in 2008, he won the John Mackey Award, given annually to the nation's best tight end.

[8] On December 9, 2009, Coffman was placed on season-ending injured reserve due to a left ankle injury.

[9] He was not signed to the Bengals reserve list following the 2011 season after his practice squad contract expired.

[10] Although Coffman played well in the preseason, catching six passes for 107 yards (a 17.8 per-catch average) and a touchdown, he was released by the Titans on August 30, 2014.

[9] On November 9, 2014, after a Zach Mettenberger interception, Coffman ran to the opposing team's sidelines and knocked Baltimore Ravens Assistant Coach Tony Coaxum to the ground.

ESPN’s Jamison Hensley characterized the hit against the defenseless coach as "shocking, violent, and appalling," while Fox's Jay Glazer described it as "possibly the cheap shot of the year.

[19] Coffman scored a touchdown in the final regular-season game rout against the Cardinals on January 3, 2016.

[23] His father Paul played tight end for the Green Bay Packers and Kansas City Chiefs from 1978 to 1987.