But he won't be a viable option for your team in the long run.
There's no doubt that the type of performance that Rosario displayed Sunday was worth noting, but Antonio Gates—the man Rosario's replacing—won't be out long. It was surprising to some that Gates was held out of San Diego's second game of the season, but in any case, Rosario is very unlikely to be a long-term touchdown scorer.
On top of that, Rosario's only catches were TDs. Although there aren't too many problems better to have from a fantasy standpoint, it shows that QB Philip Rivers won't be looking Rosario's way very much to move drives along. Sustaining drives is Gates' main contribution and one that gives him the bulk of his fantasy value.
Rosario's three catches for 30 yards and three touchdowns is enough to make nearly any fantasy football owner furious, since he was projected by ESPN to put up just two fantasy points and is owned in zero percent of leagues.
Besides, he wasn't exactly going against a cream-of-the-crop defense at home against Tennessee. The Titans defense can definitely make plays and hits hard, but they often have trouble stopping elite QB's when they get rolling and have their hands full with tight ends due to their lack of skill at the linebacker position.
If Gates' injury ends up keeping him out for a considerable amount of time, then Rosario may be worth the pick in your league if you have any bench space.
But it's highly unlikely, if even possible, that Rosario will be looked to by any fantasy owner as a serious option to start.
Tight end is one of the easiest positions to fill in fantasy football, and most owners already have a solid TE that is featured heavily in their offense. It's unlikely that many fantasy owners are in a position where they need to start Rosario like they would with a skill player.
With defenses, kickers and tight ends in fantasy, there has to be a major possibility for continuous numbers. That just isn't evident in San Diego, and though Rosario may have earned himself some accolades and a solid spot as the Chargers' No. 2 tight end, he hasn't done enough to warrant consistent success.
-- Steven Cook is a TNT breaking news writer for Bleacher Report. Follow him on Twitter to keep up with all things sports.