Paul Downs Colaizzo will pen the script for 'The Down Beat,' as well as an untitled cop drama for the network.

CBS is expanding its relationship with writer Paul Downs Colaizzo.

The scribe, who last season saw medical drama LFE go to pilot, has sold a pair of dramas to the network — including a Ryan Seacrest and Chris "Ludacris" Bridges produced marching band entry.

The Down Beat, from CBS Television Studios and Ryan Seacrest Productions, is described as an inspiring story of a former business mogul looking for personal retribution, who is determined to take down two warring gangs in the mean streets of Atlanta by offering possible teen recruits an unlikely refuge: a high school marching band.

Colaizzo will pen the script and exec produce alongside RSP scripted programming executive vp Nina Wass and Bridges.

The second drama is an untitled cop drama that centers on a charismatic and inspiring journey of a police officer who, after a tragic scandal, sets out to rebuild his personal life and rewrite the rules of policing in his Pittsburgh neighborhood.

Colaizzo will write and exec produce alongside CBSTVS-based Timberman/Beverly Productions' Sarah Timberman and Carl Beverly.

The dramas mark the first sales for the up-and-coming Colaizzo, who recently inked an overall deal with CBSTVS. He's repped by ICM Partners.

For Bridges, meanwhile, The Down Beat marks his latest TV foray and first as an exec producer. It's unclear if he will star in the drama. His credits include the Fast & Furious franchise and Hustle & Flow. On the TV side, he had a guest role on Fox's hip-hop hit Empire this season.

For RSP, meanwhile, the sale marks the company's latest scripted foray. The company has NBC's upcoming Jennifer Lopez cop drama Shades of Blue.

The banner also sold hybrid comedy The Doctor's Brother to CBS this season, with Marc Hyman attached to pen the script. From CBSTVS, the comedy revolves around a single father and dependable son who is constantly overshadowed by his mess of a younger brother — who happens to be a doctor. Wass and Seacrest will exec produce alongside Hyman.

The sales come after RSP inked a two-year overall deal with CBSTVS last year to focus on scripted projects for broadcast, cable and streaming.

For Timberman/Beverly, meanwhile, the sale comes as CBS is re-piloting drama Doubt after it was passed over last season. The company is also behind CBS' Elementary and The Odd Couple, Showtime's Master of Sex and A&E's revived Unforgettable.