Matthew Emmons-USA TODAY Sports

The Dallas Cowboys parted ways with six assistant coaches on Thursday, including former NFL head coach Joe Philbin and Leon Lett, who earned two Pro Bowl nods in 10 seasons as a Cowboys defensive lineman.

In all, the Cowboys announced that Philbin (offensive line coach), Lett (assistant defensive line), Rob Davis (assistant head coach), George Edwards (senior defensive assistant), Skip Peete (running backs) and Kyle Valero (quality control analytics) would not be coming back.

The coaches were on expiring contracts.

"These were difficult decisions to make because of the great respect I have for each of them as a coach and person of character, combined with the experiences we've all gone through together," Cowboys head coach Mike McCarthy said in a statement.

McCarthy was scheduled to hold a press conference later Thursday to discuss the departures.

The Cowboys also could lose defensive coordinator Dan Quinn and/or offensive coordinator Kellen Moore, both of whom have interviewed for head coaching jobs.

The Cowboys finished second in the NFC East with a 12-5 mark and defeated Tampa Bay in the wild-card round before losing last weekend to San Francisco in the divisional round of the playoffs. It's the second consecutive 12-5 season for the Cowboys under McCarthy.

McCarthy is 30-20 in his first three seasons in Dallas and 2023 will be Year 4 of his five-year deal.

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