Preston striker Eoin Doyle rejected Charlton in favour of a loan move to Oldham on transfer deadline day.
Doyle, who is a proven goalscorer at League One level, was surplus to requirements at Deepdale.
Charlton were looking to sign a striker to replace the departing Lee Novak. And they were able to bring in Rangers forward Joe Dodoo on loan until January.
The ex-Leicester man scored on his Addicks debut in a 4-3 win over Doyle’s new club Oldham.
MORE: Charlton boss compares Rangers striker to Arsenal starlet after debut goal
Goals from Doyle and strike partner Craig Davies brought the Latics level after Ricky Holmes and Tariqe Fosu had given Charlton a healthy lead. But Billy Clarke and Dodoo put the contest beyond reach in the second-half.
Valley boss Karl Robinson said: “That’s the first time Eoin Doyle and Davies have played together.
“Davies is a top striker at this level. Doyle - we tried to get him.
“We tried to sign him on deadline day, but he didn't want to come down south. He played and scored against us - that’s just football.”
Charlton are third in League One, while winless Oldham remain in the relegation zone.
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