But he will make his first appearance of the tour in captaining the side on Saturday, while fellow Cardiff Blue Alex Cuthbert comes back into the side, having been rested after his two tries against the Barbarians.
Warburton is the last of the touring party who has yet to play for the Lions and he becomes the 800th Lion in their 125-year history.
Tour manager Andy Irvine said: "We have played two matches so far and done very well but the stakes get higher on Saturday against the Reds, who are a leading Super Rugby side.
"It is the type of game we require at this point in the tour and it will be a measure of how we are progressing on the field.
"Tour captain Sam Warburton is the last of the 2013 tourists that has yet to pull on the famous red jersey.
"He is now fit and raring to play and it is great that he marks the occasion by becoming the 800th British & Irish Lion."
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