Straight from the official Heat press release...
The Miami HEAT announced today that they have exercised their team option on guard Mario Chalmers for the 2013-14 season. Per club policy, terms of the deal were not disclosed.
Chalmers appeared in 77 games this season (all starts) and averaged 8.6 points, 3.5 assists, 2.2 rebounds, 1.53 steals and 26.9 minutes while shooting 42.9 percent from the field and 40.9 percent from three-point range. Among league leaders, he finished 12th in steals-per-turnovers (0.99), 20th in steals per game and 25th in three-point field goal percentage. He made 10 three-point field goals at Sacramento on January 12, tying for the most during a single game in HEAT franchise history with Brian Shaw on April 8, 1993 at Milwaukee.
He started in all 23 postseason games during Miami's 2013 championship run, averaging 9.4 points, 3.1 assists, 2.3 rebounds and 28.3 minutes while shooting 41.5 percent from the field. He surpassed Tim Hardaway (80) as the franchise all-time leader in career postseason three-point field goals made on May 8 vs. Chicago, capping the playoffs with 102 total. Additionally, he scored 20 points while shooting 7-of-11 from the field, including 4-of-5 from three-point range, vs. San Antonio in Miami's Game Six win of the NBA Finals.
Chalmers was originally acquired in a draft night trade in 2008, signing with Miami on July 9, 2008 and then re-signing on December 9, 2011.