Spiller announced the move with a tweet Saturday:
— Cj Spiller (@CJSPILLER) August 30, 2014
Spiller, 27, is expected to be draw considerable interest as a free agent next spring, when the final year of his six-year rookie contract can be voided. He is set to count $5.9 million against the Bills' salary cap this season.
The Bills have yet to begin contract negotiations with Spiller. General manager Doug Whaley last addressed the situation earlier this month, before Spiller hired Speck.
"That's the issue with us: He doesn't have representation right now. So we would like to talk to him and find out what he's thinking and what's in his mind, but until he gets an agent -- unless he decides to represent himself -- we don't want to engage in contract negotiations with someone that may not end up being his representation," Whaley told WGR 550 on Aug. 20. "We like to be efficient with our work, so we're waiting until he gets an agent before we start anything."
Gary Wichard, the agent who negotiated Spiller's rookie contract in 2010, died in 2011.