The Tampa Bay Buccaneers have now lost five of their first six games this season, but none of the losses were as inexcusable as Sunday's defeat to the Pittsburgh Steelers.

The Bucs were in control for much of the game but self-destructed in the fourth quarter and watched their 16-3 lead become a 26-19 overtime loss.

Once again, Tampa spent the game settling for field goals instead of scoring touchdowns. Once again, Tampa found themselves on the losing end of a one-score game.

All of the Bucs' losses this season have come with their share of disappointment and misery, but none has been more deflating than this one.

After finally breathing some life and hope into their season with last week's upset of the Dallas Cowboys, it was all ripped away Sunday against Pittsburgh.

The season once again feels like a lost cause, and the ramifications will likely be significant.

Here are my five biggest takeaways from Sunday's loss:

Five Biggest Takeaways

1. David Walker's lack of playing time is a fireable offense: Through five games, the Bucs had only a total of six sacks. Walker, the second-year pass rusher, had two of them. He was the only Buc to have more than one.

However, despite the grotesque lack of a pass rush, Walker barely saw the field. In Tampa's first five games, Walker played only a total of 71 snaps.

That alone is a fireable offense for head coach Todd Bowles.

Against the Steelers, Walker played 28 snaps and added two more sacks to his season total. The Bucs registered five sacks on Sunday, nearly doubling their total from the first five games.

Of course, the outstanding effort was wasted in a loss, but everyone saw what this pass rush should have looked like all season.

2. Jalon Daniels was put into an unfair situation: Daniels was one of the NFL's best stories this preseason. His meteoric rise from practice squad hopeful to QB2 in a matter of two weeks was a lot of fun and made the undrafted rookie a great story and a player who was easy to root for.

However, Sunday's game against Pittsburgh proved he simply isn't ready for the backup job. Daniels took a major step backwards after playing a great game in Week 5 against Dallas.

It was unfair that Daniels' first taste of NFL action came with the team's season hanging by a thread and having the burden of saving it. The Bucs made a big mistake by not keeping established veteran backup Jake Browning, and their season is likely over after only six games, partly due to that decision.

Just to be clear, I am not saying Daniels shouldn't have made the team. He absolutely earned a roster spot. However, Tampa should have kept three QBs instead of risking a situation where an undrafted rookie had to save the season.

3. Todd Bowles won't survive the bye week: This team is in desperate need of a new leader. Bowles continues to have his team underachieve. The losses, the in-game decisions, and being thoroughly out-coached each week must have consequences.

The biggest issue is that Tampa doesn't even have a coordinator who is fit to take over on an interim basis. Bowles also runs the defense, and OC Zac Robinson's performance this season has been nearly as bad as Bowles'.

Even so, a change is needed, and the bye week is a perfect time. The team will have an extra week to learn whatever changes come with a new head coach.

4. Rueben Bain Jr. is getting better: In Bain's first two games, he was invisible. After a two-week absence with shoulder and groin injuries, the star rookie was marginally better against the Cowboys in Week 5.

Against the Steelers, Bain finally broke out. He earned his first career sack, and it was against future Hall of Famer Aaron Rodgers. 

It was a moment the rookie will remember forever, and is a great sign for things to come.

5. Bucs should be sellers at the deadline: The season is over. Even in the weak NFC South, Tampa has proven it won't be a factor in the division race.

The Athletic already encouraged the Bucs to be sellers at the deadline, and that is what should happen. This team needs some type of rebuild and will likely have a new coach before next season.

Adding valuable draft capital for the future is not only the right decision, but should also be the only decision.

Tampa has an impressive rookie class, and other young players like Emeka Egbuka, Jacob Parrish, Walker, and a few others give the club a lot of young talent to work with.

If the Bucs can trade some of their pending free agents for draft picks, it shouldn't take very long for the team to become good once again.