AP Sports Writer
SAN DIEGO (AP) -- There have been injuries and fumbles, not to mention the high expectations of following a running back with Hall of Fame credentials.
The first three years of Ryan Mathews' NFL career haven't gone the way he or San Diego Chargers fans thought they would after he was deemed the heir apparent to LaDainian Tomlinson.
OK, so Mathews did make the Pro Bowl two seasons ago.
But then came last year's nightmare. He broke his right collarbone on his first carry of the exhibition season, committed a crucial fumble that got his number of carries reduced and then broke his left collarbone in December.
Mathews is healthy and less bulky this season and vows to have more fun.
In his words, "My career kind of begins now."
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