Blades out, Bantams through
Sheffield United were knocked out of the Capital One Cup by Burton Albion on Saturday, while Bradford recorded a 1-0 win at Notts County.
All the Championship clubs in first-round action made it through, although Hull City and Wolves both needed to win penalty shoot-outs to see off League Two opposition on home soil.
Sheffield United made a less than ideal start to their campaign as they crashed out to League Two side Burton at Bramall Lane.
The Blades were behind to a Adi Yussuf goal after 34 minutes and fought back to make it 1-1 at the end of 90 minutes, debutant Nick Blackman levelling.
A goal apiece in extra time for Brewers midfielder Cleveland Taylor and then the home side's Neill Collins saw it go to penalties but Burton emerged the 5-4 victors. Albion also had Marcus Holness sent off at the end of the first period of extra-time.
League Two Bradford squeaked past League One Notts County 1-0 at Meadow Lane. James Hanson scored the Bantams' winner just before the extra-time interval.
At Elland Road, Luciano Becchio opened the scoring for Leeds against Shrewsbury when tapping the ball home after just 19 minutes, with Luke Varney doubling the advantage just six minutes later.
David Norris made it three after 66 minutes when he rifled the ball home from 18 yards out after a pass from Varney.
Michael Hector then presented the home side with an easy opportunity to make it four as he handled the ball in the area after 69 minutes, with Ross McCormack converting the spot kick to seal a 4-0 verdict before being replaced by new signing El Hadji Diouf, who had been unveiled before kick-off.
Two goals from Max Clayton (13 and 39) helped Crewe Alexandra to a 5-0 win over Hartlepool at Gresty Road.
Ajay Leitch-Smith (seven) and Mathias Pogba (31) were also on target for the Railwaymen before half-time while Pogba added another in the final minute to make it five.
Middlesbrough edged into the next round with a 2-1 scoreline against Bury at Gigg Lane, with Marvin Emnes (32) and Grant Leadbitter (61) securing Boro's passage.
An eighth-minute strike from Ashley Hemmings gave Walsall a 1-0 win over Brentford, while Matthew Robson struck after 39 minutes to see Carlisle progress at the expense of Accrington.
Barnsley edged out Rochdale 4-3 after extra time in an exciting encounter at Spotland.
Tykes goalkeeper Ben Alnwick was sent off in the final minute of normal time for headbutting Ray Putterill and Jason Kennedy dispatched the resulting penalty to make the score 2-2 and send the game into extra time.
Chris Dagnall bagged two goals in the first half of extra time to put Barnsley in the driving seat and not even a second penalty for Kennedy could help Rochdale to victory.
Doncaster prevailed 4-2 on penalties over York City after drawing 1-1 at the end of extra time at the Keepmoat.
Penalties were also required at Cheltenham, with the home side going down 5-3 to Milton Keynes Dons after ending 120 minutes of football at 1-1.
Hull City and Rotherham shared a 1-1 draw but it was the Championship side who progressed into the second round after winning 7-6 on penalties at the KC Stadium.
Wolves also needed penalties to get the better of Aldershot Town, eventually going through 7-6 on spot kicks at Molineux after a 1-1 draw at the end of extra time.