According to the North County Times, the team also reached out to former backup Billy Volek, who was released during the offseason, but Volek rejected the team's contract offer. The newspaper cited a source in reporting that the deal did not include any guaranteed money.
Boller, who lives in the area, was called at 10 a.m. Friday and made it to the afternoon practice. He sigend a one-year contract.
"I just drove on over," Boller said. "It's unfortunate what happened to Charlie, but it's a great opportunity for me to get out there and play each day as it comes and see what happens."