Rosen would have had a chance to compete for the Bucs backup job next offseason, but the fact that the Bucs chose not to protect him from signing with other teams is pretty telling. The 49ers have been decimated at the quarterback position this season, and face some uncertainty over who their quarterback of the future is long term, so Rosen likely saw a more advantageous situation and leapt at it.
The move leaves the Bucs with just three quarterbacks on their 2020 roster and an open spot on their practice squad.
Jon Ledyard is PewterReport.com's newest Bucs beat writer and has experience covering the Pittsburgh Steelers as a beat writer and analyzing the NFL Draft for several draft websites, including The Draft Network. Follow Ledyard on Twitter at @LedyardNFLDraft