(Gus Ruelas / AP)

The Dallas Cowboys’ plan to replace DeMarcus Ware and improve their woeful defense isn’t working out so well.

DeMarcus Lawrence, the rookie defensive end the Cowboys moved up to draft 34th overall, will miss at least two months after breaking his right foot in practice Tuesday in Oxnard, Calif. Lawrence, who hurt his foot when it became caught on a one-on-one drill, is expected to have surgery Thursday.

For the Cowboys, the regular season has to hold hope for better luck. The team lost Sean Lee on the first day of OTAs. The Cowboys released Ware, their all-time sacks leader, in a salary-cap move in March. He was snapped up by the Denver Broncos.

The Cowboys moved up to near the top of the second round to draft Lawrence out of Boise State after releasing franchise sacks leader DeMarcus Ware in a salary cap move in March.