With the San Francisco 49ers on their Bye Week, it makes for the perfect time to review who their worst performers have been this season. Let's dive in.

Eddy Pineiro

By far, kicker Eddy Pineiro has been the worst 49ers player this season. It's been astonishing to see after he was a hero last season when the 49ers finally moved on from Jake Moody.

Pineiro has missed three of his nine field goal attempts this season for a 66.7% conversion rate. But his most egregious performance has come on extra-point attempts.

He's missed 21 of 25 attempts, for an 84% conversion rate. Pineiro has the yips this season and has shown zero signs of getting himself out of it.

It's only a matter of time before he costs the 49ers a game. The one saving grace is that, of all the 49ers who needed the Bye Week, it was Pineiro.

He can use this time away to reset his mind. Usually, the yips is a mental issue, so by being away, Pineiro can forget all of his woes and bounce back for the second half of the season.

Jacob Cowing

What a frustrating player wide receiver Jacob Cowing has been. Most of his issues have been as a punt returner, where he oddly fields punts around the five-yard line rather than letting the ball bounce into the end zone.

Cowing has cost the 49ers valuable field position on numerous occasions this season. His worst play this year was in Week 5 against the Seattle Seahawks.

Cowing was fielding a punt in the first quarter, and rather than calling an obvious fair catch, he elected to field the punt, allowing a Seahawks player to force a fumble.

Seattle would recover the ball with perfect field position and would score a touchdown shortly thereafter. Cowing has been a negative factor for the 49ers.

Whenever Deebo Samuel gets healthy, they need to have him be the return specialist instead of Cowing. Otherwise, they will make games much more difficult to win.

Jack Jones

Cornerback Jack Jones was so bad this season that the 49ers chose him as the player to release when they officially acquired DeForest Buckner.

Jones couldn't make a single positive play after a pretty solid Week 1 outing. The final straw was when he was a penalty machine in the 49ers' loss to the Atlanta Falcons. The 49ers will no longer be subjected to his errant play.

Nick Bosa

It's not that Nick Bosa has been a bad performer this season. In fact, in the two games he's played, he's been good. However, it's because he's only played two games that he's been a "bad" performer.

Rather, he's been a massive disappointment, so he gets an asterisk in this list. Bosa cannot be relied upon when he returns because it's likely he will get hurt again. He's such a letdown.

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