Sources say Colorado will shell out $10.7 million (£7.9 m) and Whittaker heads to the U.S. on Wednesday after a London medical on Tuesday.
The Rapids’ prior record was a $7 million (£5.2 m) purchase of American forward Paxten Aaronson.
Whittaker arrived at Boro in January 2025 for roughly $9.5 million (£7 m) from Plymouth Argyle, then notched 14 goals and seven assists in 40 games last season.
He’ll link up with Matt Wells’ side, which is reshaping its attack this summer, focusing on width, and Whittaker is expected to be the marquee player on debut. For my money, Whittaker is the missing spark Colorado needs.
Sources reveal Colorado scouted several European DP wingers; Whittaker will join Aaronson as one of two Designated Players.
Hull City acquired centre‑back Lucas Herrington from Colorado for an initial $17 million, a fee among MLS’s highest.
Under Wells, Colorado sits seventh in the Western Conference with 31 points from 22 matches, boasting five straight clean sheets but still searching for firepower. Will his arrival finally unlock the Rapids’ scoring drought?