Celtics hire Frank, who was on Mavs' radar

The Boston Celtics hired Lawrence Frank on Thursday after Doc Rivers pinpointed Jason Kidd’s old head coach in New Jersey as an ideal new No. 1 assistant.

Frank, though, has also been on the Mavericks’ radar in recent weeks.

Sources with knowledge of the team’s thinking told ESPNDallas.com that Frank was Rick Carlisle’s top choice to replace Dwane Casey had Casey landed one of the two head-coaching jobs (Hawks and Clippers) he was widely expected to get.

The Newark Star-Ledger reported Thursday that Nets officials believe Frank was also pursued by the Indiana Pacers. But it seems safe to suggest that the opportunity to reunite with Kidd – who remains a Frank fan to this day -- would have been the bigger threat to Boston, which signed Frank to a one-year deal to replace Tom Thibodeau.