Brian Jackson not at practice Dan Leberfeld

Rookie cornerback Brian Jackson wasn’t on the practice field on Monday.
Clearly he was cut to make room for Darrelle Revis.
Why would Tannenbaum cut Jackson, and not one of the three waiver claims on Sunday?
Good corners are hard to find.
Based on the amount of waiver claims made by the Jets, you would think they were the St. Louis Rams, Detroit Lions or Seattle Seahawks, teams that are rebuilding.