The Packers' leading receiver posted on Twitter on Sunday that he was discharged from a Phoenix-area hospital after being held overnight for observation.
Cobb was hurt in the first quarter after stretching out for a diving 51-yard catch to the Arizona 3-yard and landing hard to the turf
''Thank you for all the prayers and support,'' Cobb wrote.
The Packers lost 26-20 in an overtime thriller after Larry Fitzgerald scored on a 5-yard shovel pass. Green Bay had tied it at the end of regulation on Aaron's Rodgers' 41-yard touchdown pass to Jeff Janis.
''Such a tough way to go out,'' Cobb wrote.
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