John Jeffers once blocked for Vikings legend Adrian Peterson on the football field. After his guitar-only national anthem on Monday Night Football, angry fans wanted the NFL to ban rock renditions altogether.

The Whiskey Myers lead guitarist performed "The Star-Spangled Banner" before the Minnesota Vikings hosted the Buffalo Bills on Monday, but viewers quickly complained about his instrumental interpretation. With Veterans Day just two days away, some fans and ESPN viewers found the timing unfortunate.

Nitpicking NFL fans said the alternative rendition wasn't adequate, especially with Veterans Day just two days away, after FOX NFL Sunday nailed its tribute to veterans with Charissa Thompson's powerful tribute to her sister in the U.S. Coast Guard.

Jeffers was at U.S. Bank Stadium for reasons that went beyond his music career and his support for the organization, which he showed by wearing a Peterson jersey during the performance.

The Vikings' running back legend was set to enter the Vikings Ring of Honor and the two had grown up together and played football in East Texas. Peterson led the school to its first playoff appearance in eight years during his junior season, rushing for 2,051 yards and 27 touchdowns.

The Palestine High School teammates reunited, but a ruthless internet didn't stop it from calling the performance 'another epic fail.'

One NFL fan complained, "Another totally embarrassing National Anthem for the NFL." A second added, "Can we PLEASE STOP with the heavy metal for the National Anthem for the NFL?"

Other viewers questioned why the league seemed so fond of instrumental rock interpretations after Mike McCready played the Star-Spangled Banner before Seahawks-Patriots and Pablo Sainz-Villegas' rendition during the NFL Spain game in Madrid.

"Did the NFL collectively decide to just have guitarists doing the anthem this year or did we just run out of people that know all the words to sing it?" they added.