The news this week that Raiders quarterback Jimmy Garoppolo underwent foot surgery shortly after he signed with the team in March — and will likely be sidelined until training camp — obviously raised eyebrows and concerns.

Given Garoppolo’s injury history, it would be naive to wave off any possibilities — even a worst-case scenario in which his rehabilitation lingers beyond training camp and threatens to delay his first season with the Raiders.

Or even the whole season.

Couple that with the looming presence of Tom Brady, who has agreed to a deal with Mark Davis to come on as a partial owner of the Raiders, and it’s easy to understand why some people are already speculating about the possibility of Brady coming out of retirement to quarterback the Raiders.

It’s a tantalizing thought, but one filled with so many obstacles it’s essentially a nonstarter.

But more on that in a bit.

Garoppolo’s surgery was not a surprise to the Raiders. Based on the timeline laid out by a person with knowledge of the situation, the Raiders knew he needed surgery before they signed him, and they concluded it was safe to move forward, based on a thorough evaluation by their medical staff.