The 57-year-old former Southampton and Cardiff boss was relieved of his duties on Sunday following a woeful start to the season that saw the Owls secure only one win.
The 2-0 defeat at Blackpool proved to be the final straw for chairman Milan Mandaric, whose decision to axe Jones failed to get an immediate reaction here as Anthony Knockaert fired the visitors into an early lead.
However, Wednesday - led by first-team coach Stuart Gray - showed the Hillsborough faithful what they were capable of as they ended a run of three straight defeats courtesy of on-loan Sunderland striker Wickham's first-half double.
Charlie Austin would have been a Bournemouth player was it not for a transfer embargo four years ago - a missed opportunity the Cherries were made to rue when the in-form striker helped QPR to a 3-0 victory.
Reading maintained their unbeaten home record in the Championship this season with a 1-0 win over Charlton at the Madejski Stadium while Burnley slipped to third in the table after a goalless draw at home to Watford.
John Lundstram marked his home debut with the only goal as Yeovil recorded back-to-back victories for the first time at this level and sentenced eight-man Blackpool to just their second defeat in 11.
Ipswich moved up to eighth in the table after claiming their first home win since the end of September – a 3-1 victory over a poor Blackburn side.
Goals from Paddy McCourt and Jacob Mellis gave managerless Barnsley their first win in six games, and first away from home for 10 months, with a 2-1 victory over Brighton.
Oliver Norwood's glorious long-range strike sunk Bolton and handed Huddersfield a 1-0 win - their third successive victory.
Nathaniel Chalobah helped Nottingham Forest secure a 2-2 draw at struggling Millwall as the on loan Chelsea midfielder rose highest from a corner with 25 minutes remaining.
David Cotterill's superb strike ensured Doncaster claimed a 1-1 draw at Birmingham and ended an eight-match losing streak against the midlands club which stretched back 59 years.
- Sports & Recreation
- Anthony Knockaert
- Milan Mandaric