Northampton and Oldham have both been relegated to League Two after a final day 2-2 draw at Sixfields.
The Cobblers were virtually relegated before kick-off due to their vastly inferior goal difference while Oldham needed three points to guarantee survival having started the day outside the relegation zone, but they could only draw, which sent them down courtesy of Rochdale's victory over Charlton.
The Latics took a crucial lead at Sixfields when Duckens Nazons' cross fell for George Edmundson whose first-time shot left Richard O'Donnell wrong-footed.
The Cobblers responded with two goals in the five minutes leading up to half-time as Matt Grimes equalised by slamming a penalty into the top corner after Sam Hoskins had been fouled.
And the home side were ahead at the break thanks to a goal in first-half stoppage-time when Johny Placide failed to hold onto Leon Barnett's shot and centre-back Ash Taylor scrambled in.
Oldham levelled things up through Thomas Haymer as he was left unmarked to head in Jack Byrne's free-kick 10 minutes into the second-half, but news of a goal for Rochdale meant the draw was not enough to save Oldham, who could not find a winning goal and were duly relegated alongside Northampton.