Two second-half goals from Matt McClure added to Dave Winfield’s first-half header as the Chairboys secured a well-deserved victory at the New York Stadium.
Rotherham took the lead after just 16 seconds through Daniel Nardiello, but Winfield hit back in the 29th minute, heading in Josh Scowen’s free-kick.
The hosts retook the lead before the break through Mark Bradley, but the Wanderers were the better side after the break and two superbly-taken goals by McClure sealed an important three points.
Gareth Ainsworth made two changes to the side that started against Northampton Town with Bruno Andrade and Matt McClure in for Sam Wood and Dennis Oli.
Wanderers got off to the worst possible start as the hosts took the lead after just 16 seconds. Ben Pringle was allowed to deliver from the right and Nardiello beat his marker to the ball to hook goalwards. The shot was straight at Jordan Archer, but he dropped the ball and Nardiello tapped in from close-range.
Mark Bradley tried his luck from 20 yards in the 10th minute, but his strike was straight at Archer who made a comfortable stop as the hosts looked dangerous every time they pushed forward.
However, Stuart Lewis should have levelled in the 13th minute after a quick break saw McClure pick the midfielder out five yards from goal, but he fell backwards as he shot and sliced his effort wide. It was a great chance and the Rotherham defence looked vulnerable to any attack with pace.
Wycombe got the reward their play deserved when skipper Dave Winfield levelled in the 29th minute. Wanderers were awarded a free-kick wide on the left after Mark Bradley’s foul on Dean Morgan and Winfield escaped his marker to get to Josh Scowen’s free-kick first and thump an unstoppable header past Andy Warrington.
The hosts retook the lead in the 35th minute when Bradley crashed home a volley from the edge of the area following Pringle’s corner. It was a superb strike from the full-back, but he was afforded far too much space in which to get his shot off.
Morgan’s free-kick forced Warrington into a save low down to his left with five minutes of the first half remaining, but the final chance of the opening period fell for the Millers as Nardiello headed over the bar from 10 yards.
Blues started the second half brightly and got their reward five minutes in when McClure latched on to Danny Foster’s ball over the top, cut inside Jason Taylor and drilled a left-footed effort past Warrington.
It was 3-2 to the Chairboys another five minutes later when Morgan’s clever quick free-kick put McClure through on goal and the striker coolly lifted the ball over Warrington and into the back of the net. They were two clinical finishes from the youngster and both runs were timed to perfection.
Rotherham pressed forward, but struggled to break through the Wycombe defence and their task was made even harder 15 mintues from time when Josh Morris was stretchered off after a challenge from Danny Foster. Millers boss Steve Evans had already made all three subs and they were forced to finish the game with 10 men.
Nardiello headed harmlessly wide with 10 minutes remaining before Morgan had an effort deflected narrowly off target. Charles Dunne then headed against the bar from the resulting Scowen corner.
Wanderers were a much more solid outfit in the second half and the hosts created very little late on as Ainsworth’s men held on for a well-deserved win.
Wycombe: Archer, Foster (Kewley-Graham 81), Dunne, Winfield (c), Johnson, Grant (Wood 63), Lewis, Scowen, Andrade (Ainsworth 85), Morgan, McClure.
Subs: Harrison, Oli, Morias, Hause.
Rotherham: Warrington, Bradley, Morris, Sharps (c), Taylor, Rooney (Hunt 63), Frecklington (Evans 46), Pringle, Cameron, Revell (Odejayi 57), Nardiello.
Subs: Wilson, Rose, Thompson, Walker.
Attendance: 5,688 (138 Wycombe)