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The Saints made the cuts as the team tries to get under the 2013 salary cap. The moves will save the Saints about $2 million, according to Saints Nation Blog.
Thomas, 29, spent the last four seasons with the Saints after being acquired in a trade from the New England Patriots. Thomas played in 48 games for the Saints (started 25) and caught 81 passes for 677 yards and seven touchdowns.
Saints general manager Mickey Loomis said it was hard to part ways with Thomas, according to Sports NOLA:
"This was an extremely difficult decision to make with David today," said Loomis. "Since he came here in 2009, he's been an important part of our team, both with his performance on the field and with the outstanding veteran leadership he's provided for us."
The third-round pick in the 2006 NFL Draft had his best season in 2009, his first year in New Orleans. Thomas played in 15 games, starting eight, and caught 35 passes for 356 yards and a touchdown.
Patrick, 24, was a third-round pick in the 2011 NFL Draft out of Louisville. In two years with the team, Patrick played in 24 games and started just one. He compiled 27 tackles and two pass deflections in his time with the Saints.