Joey Bosa made a costly mistake after the Chargers allowed the Jaguars to score a fourth-quarter touchdown Saturday night.As Bosa left the field following the Jaguars Michael Jordan Jersey ' score, he in frustration. He hadn't yet left the playing surface, so officials flagged him for unsportsmanlike conduct.That penalty led Jaguars coach Doug Pederson to go for a 2-point conversion instead of the normal extra point. Jacksonville was succe sful, which made the score 30-28 and set the Jaguars up to win the game 31-30 with a field goal, which they notched on their final drive.Pederson explained after the game that Bosa's penalty .MORE: Bosa was asked about the helmet throw during the Chargers' media availability Sunday."I really, really do want to say some things," Bosa said, per after initially saying he didn't want to comment on it. "I need to be more accountable for my actions."Bosa didn't just pick up the one unsportsmanlike conduct penalty. He was called for one earlier in the game after another Jaguars touchdown. Jacksonville was able to kick off from the 50-yard line as a result of that call, and that gave the Chargers worse-than-average field position as a result.MORE: So, Bosa surely needs to clean up that area of his game in 2023. He knows that, but he also pointed out that there was a reason he was having trouble keeping his emotions in check."It's a heated game," he said. "I'm hurting out there. I'm playing on half a leg."Bosa played in just six games during the 2022 regular season Connor Bedard Jersey and 2023 playoffs as he dealt with a serious core muscle injury. The problem was described as being in the groin area. Evidently, even after returning late in the season, the injury was bothering Bosa.That Bosa wasn't healthy explains why he didn't play a full complement of snaps against the Jaguars. It also begs the question of why coach Brandon Staley played the edge defender in the team's meaningle s Week 18 game against the Broncos. Bosa left that game early while nursing the groin problem.MORE: Either way, Bosa has a couple of goals as he heads into the 2023 NFL offseason: get healthy and get better control of his emotions to avoid more on-field outbursts.