Indianapolis Colts’ worst nightmare at left tackle in 2021

ARLINGTON, TEXAS - JANUARY 01: Liam Eichenberg #74 of the Notre Dame Fighting Irish stands on the field before the College Football Playoff Semifinal at the Rose Bowl football game against the Alabama Crimson Tide at AT&T Stadium on January 01, 2021 in Arlington, Texas. The Alabama Crimson Tide defeated the Notre Dame Fighting Irish 31-14. (Photo by Alika Jenner/Getty Images)

The Indianapolis Colts were hit with devastating news at the end of the regular season when longtime starting left tackle Anthony Castonzo disclosed his intentions to retire, leaving the team with a gaping hole at one of the most important positions on the field.

While that announcement was unsettling, most fans didn’t…