Warmup pitches

[DonP]

Last night between innings, the first baseman on his way to his defensive position, stopped at the pitchers circle, picked up the ball and took two warm up pitches to the catcher. The pitcher, who was the last one out of the dugout came out and was ready to start the inning when the opposing team protested that the first baseman must deliver at least one pitch since he took the warm up pitches. I have reviewed the rule book and can find no reference to this. Direction please...... Thanks