The former Leeds forward praised the 24-year-old striker after the 1-0 win over Bristol City.
Leeds beat City 1-0 and, despite the fact he didn't score, owed Wood a lot for their winner.
But the rest of the United side generally flattered to deceive and Whelan was damning in his assessment of Wood's team-mates.
Whelan is quoted as saying by the BBC: "When Chris Wood came on he was excellent and he was a bit of a game changer for United. He was part of the goal and just his presence in the box made it a different kind of game for Bristol."
On the rest of the Leeds side, however, the former forward was far from as generous: "It was probably one of the most unconvincing performances I've seen this season yet we've come away with a win and a clean sheet.
"There’s so much there that needs to be approved because against a better side, it would have been a different result today.
"The first half was like they’d played three games in three days - there was no energy, no creativity and the body language was all wrong."
Leeds head coach Steve Evans was also full of praise for the 24-year-old after the win over Bristol City - understandably.
But the Scot also claimed the Whites could have sold the New Zealander 'five times' this window.
Wood is clearly in demand and, when Leeds aren't playing well, can make a huge difference in the final third.