For perhaps the first time in their decade-long history, the Charlotte Bobcats have assembled a deep and solid frontcourt rotation. Thursday the Bobcats came to terms with former Utah Jazz center Al Jefferson. Friday the front office closed a deal to re-sign power forward Josh McRoberts, who started 19 of his 26 games with the Bobcats last season after a February trade. McRoberts is getting a two-year contract with a total value of about $5.5 million, according to an NBA source. The second of those two seasons is at McRoberts’ option. Last month the Bobcats used the fourth overall pick of the draft to select 7-footer Cody Zeller out of Indiana. The Bobcats still have center Bismack Biyombo under contract. Combining these four players gives the Bobcats their most depth ever at center and power forward. Jefferson and McRoberts can’t be signed until after the NBA’s moratorium period ends July 10. Bobcats officials also are barred from discussing free agents with the media until then. But general manager Rich Cho said with conviction at midseason the Bobcats would address their deficiencies in low-post scoring and rebounding, either through the draft or free-agency. Turns out the front office used both paths to shore up the frontcourt.