The former Birmingham City forward has completed his move to the Latics on a free transfer after resolving a contract dispute with Swindon Town, where he spent last season on-loan
Rooney, who has agreed a two-year deal with the option for another 12 months, has spent pre-season training with the Latics while attempting to resolve a contract dispute with his former club Swindon Town.
The Irish striker had agreed to join the Robins on a permanent basis this summer but, when the club was taken over in February, the new owners said they would "review" the 25-year-old's contract because of its "high value".
With his future at the County Ground uncertain, the Dublin-born forward began training with Lee Johnson and Oldham and impressed enough to earn a deal on a free transfer ahead of the SkyBet Football League season which starts this weekend.
Rooney, who has nine Republic of Ireland U21 caps to his name, becomes the club’s ninth summer signing and will significantly bolster their attack as they look to build on last season’s 19th-placed finish in the third tier of English football
Commenting on his latest acquisition, Latics boss Johnson expressed his delight at completing the deal.
“It is a great acquisition, especially as there was a lot of interest from other clubs. Adam is a good bloke and a good character,” he told the club’s official website.
“Adam is a good age, is mobile and has a good scoring record. He brings others into play and is not afraid to put his head in where it hurts and take a cut to the eye if that is needed,” Johnson added.
Oldham become Rooney’s eighth club in as many years after beginning his career with Stoke City. A prolific spell in Scotland with Inverness Caledonian Thistle earned him a move to Birmingham City where he managed just 18 appearances in two years before he was sold to Swindon.
“I spoke to a couple of other clubs, but was struck by how positive it was here and also the ambitions of the club,” Rooney said.
“I came in and trained and found they are a great bunch of lads. There is unbelievable talent in the squad and I’m sure we are capable of pushing at the top of the league,” he concluded.
Meanwhile, Goal understands that Morecambe are close to tying up a deal for free agent Padraig Amond after he was released by Accrington Stanley at the end of last season.
The 25-year-old, who enjoyed fruitful spells with both Shamrock and Sligo Rovers, has spent the past few weeks training with the League Two side and manager Jim Bentley has said he’s very keen to secure his services before the campaign begins.
“Padraig is a player I'm keen on. I think we need another forward player and he's got goals at this level,” Bentley told the BBC.