England lock Ollie Chessum will return to Leicester Tigers' starting XV on Sunday as his side host Saracens in the Gallagher Premiership.
England captain Maro Itoje will return to captain a Saracens side containing four of his international team-mates during the Guinness Six Nations when they host Harlequins in the Gallagher Premiership on Saturday.
There is no return for O’Mahony, whose last appearance came in the December 13 defeat at Castres.
The politically engaged first Muslim captain of South Africa is unique in his background, ability and leadership credentials.
Bath will take a five-point lead at the top of the Gallagher Premiership into 2025 after blowing Saracens away at a raucous Recreation Ground.
Saints defeated the north Londoners three times last season and were led out by Nick Tompkins on his 200th appearance for the club, who were dealt a pre-match blow when Elliot Daly withdrew with a hamstring problem.
Round six of the Gallagher Premiership promises to deliver another thrilling weekend of action, with teams looking to solidify their positions ahead of a break before the Test rugby returns in November.
Twenty-eight of the 36 players named by Steve Borthwick in the England squad for the upcoming Autumn Nations Series will start for their clubs in this weekend’s Gallagher Premiership.
With England versus New Zealand on the November 2 horizon and Steve Borthwick poised to name his Test squad on Wednesday for the four-game Autum Nations Series, a number of leading candidates have been pencilled in for some timely club action.
There are just four weeks to go before the All Blacks arrive at Allianz Stadium on November 2, so players will be vying to impress.