Runzler compiled a 3.30 ERA and fanned 53 in 46 1/3 innings at the Triple-A level for San Francisco last season before bolting to Japan.
The 38-year-old Grilli posted a 4.00 ERA over 54 innings last year. The deal is for two seasons, and contains an option for a third year. Grilli is set to make about $8 million.
The right-handed reliever was acquired from the Braves in November. The former closer for the Angels in 2011 went 0-2 with a 2.88 ERA, 1.20 WHIP and three saves in 58 appearances for Atlanta last season.
Bell was released by the Yankees in June, though he did not pitch for them at the major league level. He stumbled along with a 7.27 ERA earlier in the season with Tampa Bay.
Rollins, 36, has a career .230/.277/.345 slash line over 200 at-bats at Dodger Stadium. He hit .243/.323/.394 over 538 at-bats last season. He's in the final year of his contract, and is set to make $11 million next year.
After dealing Yasmani Grandal to Los Angeles in the Matt Kemp deal, the Padres were in need of a new backstop. It didn't take long for them to replace Grandal, as the team acquired Norris shortly after the Kemp deal went through.
Pitcher Seth Streich will also head to the Padres in the deal, according to FoxSports.com The 23-year-old posted a 3.16 ERA over 114 innings in High A last season.
The 25-year-old Norris is coming off a season in which he hit .270/.361/.403 over 385 at-bats. Norris is under team control through the 2018 season.
Hahn, 25, posted a 3.07 ERA over 73 1/3 innings in the majors last year. He was excellent in Double-A, posting a 1.91 ERA in 42 1/3 innings before being called up.
Carter spent last season in Japan, pitching for the Nippon Ham Fighters. He posted a 3.97 ERA over 45 1/3 innings.