Three former Notre Dame offensive linemen landed on the NFL's 2019 All-Pro team, released Friday by the Associated Press.

Baltimore Ravens left tackle Ronnie Stanley, Indianapolis Colts left guard Quenton Nelson and Dallas Cowboys right guard Zak Martin made up three of the five offensive linemen on the first-team lineup.

The all-league unit was rounded out by Philadelphia Eagles center Jason Kelce of the Cincinnati Bearcats and New Orleans Saints right tackle Ryan Ramczyk of Wisconsin Badgers.

The trio of Stanley, Nelson and Martin developed under former Notre Dame offensive line coach Harry Hiestand from 2012-17. Hiestand left the Irish for a return to the NFL from 2018-19, but got fired by the Chicago Bears on Tuesday.

The 6-foot-5, 330-pound Nelson and 6-foot-6, 315-pound Stanley each appear on the All-Pro list for the first time after the two former teammates last anchored Notre Dame's offensive line together in 2015. Both were selected by their respective NFL teams with the sixth overall pick in the first round, with Stanley in 2016 and Nelson in 2018.

Martin, meanwhile, makes an All-Pro appearance for the sixth time — the most by a Cowboys player since former defensive end DeMarcus Ware did so seven times with the latest coming in 2012. The 6-foot-4, 315-pound Martin was the No. 16 overall pick in the first round of the 2014 NFL draft.

Martin came to Notre Dame as a four-star recruit — the 247Sports Composite's No. 142 overall prospect, No. 11 offensive tackle and No. 2 player in Indiana for the 2009 class — out of Bishop Chatard. He has started 94 of his possible 96 games through six NFL seasons, following a career with the Irish in which Martin was the starting left tackle from 2010-13.

Stanley arrived at Notre Dame as a four-star recruit — the 247Sports Composite's No. 125 overall prospect, No. 12 offensive tackle and No. 1 player in Nevada for the 2012 class — out of Las Vegas Bishop Gorman. Stanley has started in all 56 games logged, including 14 on the 2019 season with the Ravens, who boast the NFL's best record at 14-2.

Also a four-star recruit, Nelson was Notre Dame's highest-ranked player of the three as the 247Sports Composite's No. 61 overall prospect, No. 5 offensive tackle and No. 2 player in New Jersey for the 2014 class. By way of Red Bank (N.J.) Catholic, he became a unanimous All-America selection and started 36 of his 37 career games with the Irish. Through two NFL seasons, Nelson has started all 32 possible games and anchored the Colts' offensive line.

The trio's accomplishment on the All-Pro first team strengthens Notre Dame's case as "Offensive Line U" after ESPN ranked the unit seventh prior to the 2019 season. The Irish were pegged at seventh behind USC, Ohio State, Michigan, Oklahoma, Wisconsin and Alabama. Behind Notre Dame were Florida State, Texas and Florida to round out the list.