He also earned Pennsylvania Football News All-Class AAAA and Pittsburgh Tribune-Review "Terrific 25" honors while at Taylor Allderdice and was a two-time First-team All-City League selection.

Jarrett spent time playing both offense and defense at Taylor Allderdice.

[2] Jarrett played football at Milford Academy in 2012, helping the team to a 7–4 record.

[3] Jarrett missed the final three games of the 2016 regular season due to injury.

[6] Lance Zierlein of NFL.com predicted that he would go undrafted and be a priority free agent, stating "If he can play with better pad level and improve his hand usage to take full advantage of his size, he might be able to improve enough to create an opportunity for himself with a team that is looking for size".