The Rockets had not finished celebrating landing Dwight Howard when they moved to begin filling the roster around him. They quickly reached agreements to bring back Francisco Garcia and to sign his former Sacramento Kings teammate, Omri Casspi, two individuals with knowledge of the deals said Saturday. The Rockets acquired Garcia, 32, from the Kings at the deadline, but did not pick up the option on the final season of his deal, worth $6.5 million. They agreed to terms Saturday on a two-year veteran’s minimum contract worth $2.6 million, the second season at his option. Garcia’s play was sporadic in a limited role after the trade late in the season, but he excelled in the playoffs, defending Thunder star Kevin Durant and giving the Rockets an enormous offensive lift. Garcia, 6-7, averaged 6.4 points in his 18 regular-season games with the Rockets. In the six playoff games against Oklahoma City, Garcia averaged 10.7 points, making 45.9 percent of his 3-pointers.