1. **Elbow Injury**: This was the most severe injury Purdy faced during the NFC Championship against the Philadelphia Eagles, leading to reconstructive surgery.
2. **Rib Injury**: Purdy reportedly suffered bruised ribs against the Buccaneers, but managed to play through the pain against the Seahawks.
3. **Concussion**: The latest setback, placing him in concussion protocol after a heavy hit during a Monday night game.

In the NFL, durability is a crucial asset, especially for a franchise quarterback. Similar concerns surrounded Jimmy Garoppolo during his time in San Francisco, leading to a rotating door of backups. As you pointed out, Purdy’s situation echoes this, raising concerns that could become more pressing if these issues persist.
However, while availability is vital, it’s also common for quarterbacks, especially younger ones, to face a series of injuries as they adapt to the rigors of the NFL. Players like Matthew Stafford, who initially dealt with frequent injuries, eventually found ways to stay healthier later in their careers.
Ultimately, while Purdy’s toughness is unquestionable, these injuries are something the 49ers should monitor. Given Kyle Shanahan’s history of needing multiple quarterbacks due to injuries, investing in better protection—especially if Trent Williams is out—might be wise for San Francisco moving forward.