But in an entertaining encounter, which ended 2-0 to the hosts, it is possible that a few others also caught the eye of the Rams' boss.
The only Rangers player to emerge with any credit, goalkeeper Foderingham made a string of saves to keep the scoreline down and could do little about Hearts' goals. Veteran Derby pair Scott Carson and Chris Weale are out of contract next summer, while Lee Grant is expected to remain with Stoke City, and McClaren may wish to freshen things up in Foderingham's position.
Hearts' Souttar has been linked with a move to Aston Villa of late and showed why with a commanding display at centre-back. The 20-year-old is fast outgrowing the Scottish Premiership and England's second tier could be the ideal next step in his development. On Wednesday's evidence there's no reason why McClaren wouldn't want him at Pride Park.
Perhaps a peculiar inclusion to anyone who watched the game, with the Rangers right-back criticised for his role in both goals conceded by his side. It's not been the easiest of campaigns for Tavernier, although he impressed for Mark Warburton's side last term and plays in a position that Derby are desperate to strengthen in January, with Cyrus Christie both injured and soon to be out of contract.
Walker registered an impressive eight goals and six assists from 22 Premiership appearances last term and has continued in the same vein this campaign, scoring six goals and assisting three in his 13 league outings. The right winger was a real handful for the Ibrox side on Wednesday, and supplied the cross from which Hearts doubled their advantage through Robbie Muirhead.
While he may not have made it onto the scoresheet it was not for the want of trying, with Foderingham thwarting him on several occasions. Rangers' defenders struggled to contain the six-foot-five American, who was equally adept with his feet as he was with his head, setting up Muirhead's first with a superb first-time cross. Derby are said to want a target man in January and the 25-year-old could be ideal.