The 25-year-old Ring was selected as an International League All-Star earlier this season, using a new three-quarters arm delivery to fill a relief role for the Tides.
In 34 games at Norfolk, Ring was 2-1 with 10 saves and a 2.97 ERA, setting a new Tides franchise record with 26 2/3 scoreless innings from April 19 through July 8. During that stretch, Ring went 2-0 and converted all eight of his save opportunities.
Ring takes the place of right-handed pitcher Mike Pelfrey on the Mets' roster.
Considered the top pitching prospect in the Mets organization, Pelfrey was optioned to Norfolk, ending his first stint in the major league rotation after four starts.
The 22-year-old Pelfrey showed flashes of brilliance and promise in his big league appearances after being recalled from Double-A Binghamton of the Eastern League on July 8.
Pelfrey went 2-1 with a 5.48 ERA in four starts with the Mets. In 21.1 innings, he surrendered 25 hits, 14 runs, 13 earned, with 12 walks and 13 strikeouts.
New York's first-round selection in the June 2005 draft (ninth overall), Pelfrey made his major league debut on July 8 against the Florida Marlins at Shea Stadium, pitching five innings and earning a victory in the Mets' 17-3 win.
He pitched six solid innings on July 18 at Cincinnati to improve to 2-0 before suffering a defeat on July 23 against the Houston Astros, allowing five runs in 4 1/3 innings.
In his fourth start on Tuesday, Pelfrey allowed four runs and seven hits in six innings, taking a no-decision in New York's 6-5 loss at Florida.