Kansas City Chiefs backup quarterback Brady Quinn is likely to start against the Tampa Bay Buccaneers in Week 6.

There is “every indication” that it will be Quinn starting this week in Matt Cassel’s place, according to ESPN.

Cassel left the fourth quarter of the Chiefs 9-6 loss to the Baltimore Ravens in Kansas City on Sunday with a concussion, according to Adam Schefter of ESPN.

Cassel’s poor play this season has been a focal point of a disgruntled Chiefs’ fan-base. Some even cheered Sunday when he was lying on the field after taking a vicious hit from Ravens’ defensive tackle Haloti Ngata.

"It's 100 percent sickening," right tackle Eric Winston said. "If he's not the best quarterback, he's not the best quarterback, and that's OK. But he's a person. And he got knocked out in a game and we've got 70,000 people cheering that he got knocked out."

No matter how bad a player is playing, it’s up to the coaches to make personnel decisions. Cheering for an injury to anyone, especially your team’s player, is just as Winston said it—sickening.

Cassel threw two interceptions in the game and fumble twice, including a fumbled snap on the goal line as he attempted to sneak into the end zone behind his center.

It’s hard to imagine why Chiefs’ fans would support Cassel after a performance like that. But, support and class are two different things entirely.

A backup quarterback is always a fan favorite when the starter is struggling. While it may seem appealing to make the switch, the results may end up being the same or worse if a change is made.

That’s especially true because the Chief’s backup, Brady Quinn, has not had a successful go of it thus far in his NFL career.

Drafted No. 22 overall by the Cleveland Browns in 2007, Quinn has spent the majority of his time in the league relegated to backup status.

In his six NFL seasons he’s started just 11 games and made 15 appearances in relief duty. While in Denver from 2010 to 2011 he attempted zero passes. He’s thrown for just 1,934 yards and recorded 10 touchdowns and nine interceptions.