Gary Alexander scored a goal in each half, including one from the penalty spot, before Jonathan Forte headed the third with 10 minutes remaining to seal a comfortable win in their first match of the season. Scunthorpe midfielder Mark Duffy was sent off in the 85th minute for a second bookable offence but Crawley had already wrapped up the match.
Doncaster, who were relegated from the Championship last term, kicked off their campaign with 3-0 win away at Walsall. Chris Brown opened the scoring in the fifth minute before David Cotterill's 35-yard strike and Kyle Bennett's long-range effort sealed the win.
Notts County won their first fixture when they beat Crewe 2-1 at the Alexandra Stadium despite being reduced to 10 men. Francois Zoko and Yoann Arquin scored for the visitors before the latter saw red for violent conduct in the 60th minute. Mathias Pogba pulled one back for Crewe but it was not enough salvage any points from the game.
MK Dons beat Oldham 2-0 as they were also reduced to 10 men late in the game. Darren Potter opened the scoring in the 34th minute before Daniel Powell added the second after the break, with Antony Kay's dismissal deep into injury time not enough to derail the victory.
Jean-Louis Akpa-Akpro scored twice as Tranmere beat Leyton Orient 3-1 at Prenton Park. The French-born Ivorian followed up Zoumana Bakayogo's 34th-minute strike with two goals in the second half to seal the win, with Michael Symes' late penalty for the Os scant consolation.
Meanwhile, Portsmouth were held to a 1-1 draw at Fratton Park by Bournemouth. Izale McLeod fired the home side's goal from 30 yards in the 19th minute but Lee Barnard cancelled it out midway through the second half as the south coast sides shared the points.
Sheffield United held on to an early lead to claim a 1-0 win over Shrewsbury. Midfielder David McAllister put the Blades ahead in the fourth minute and they held on despite a late period of dominance by the visitors.
Stevenage and Carlisle drew 1-1 after Matt Robson's goal for the visitors was cancelled out by Robin Shroot's equaliser two minutes from full time while Yeovil and Coventry also drew 1-1 when the Glovers' Richard Hinds cancelled out Cody McDonald's 10th-minute header.
Elsewhere, Bury drew 0-0 against Brentford, Preston played out a goalless draw against Colchester and Swindon tied 0-0 with Hartlepool after Tommy Miller missed a 72nd-minute penalty.
- David Cotterill
- Jonathan Forte