Crabtree has been a starter for the San Francisco 49ers since they took him in the first round of the 2009 draft. He had 68 catches last year but dropped passes were a problem, and he averaged a career-low 10.3 yards per reception while scoring only four touchdowns.
The Dolphins remain in the market for help even after acquiring receiver Kenny Stills in a trade with New Orleans. They traded disgruntled receiver Mike Wallace to Minnesota, and released Brian Hartline and Brandon Gibson.
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