Posh were beaten 3-1 on the final day as Billy Sharp signed off at Doncaster Rovers with a hat-trick.
Billy Sharp concluded his latest spell at Doncaster Rovers in fairy-tale fashion with a second half hat-trick as Peterborough United suffered a final day defeat at the Weston Homes Stadium.
Harry Leonard finished on 17 goals for the season after a second half strike, but Posh were unable to capitalise on that goal and the visitors took all three points.
It was a game that was competitive in the first 45 minutes, but Posh looked devoid of energy in the second half and Grant McCann's men took advantage.
Goalkeeper Alex Bass made a string of fine saves, keeping out Brandon Hanlan, Hakeeb Adelakun and Sharp, who also saw a second half goal ruled out for offside.
Leonard saw a strike from distance kept out by Lo-Tutala while Ben Woods also forced the keeper into a first half save with Brandon Khela's rebound deflected wide of the target.
Bass kept out Broadbent on the stroke of half-time as he raced clean through on goal while five minutes into the second half, Kyrell Lisbie headed a corner kick from Matt Garbett wide.
The deadlock was broken on 53 minutes as the visitors took advantage of a wayward pass out of defence from Mendonca, the ball worked to SHARP who made no mistake.
Lisbie was denied by Lo-Tutala twice in a minute while Leonard fired wide as Posh responded well to the set-back but on 72 minutes, it was 2-0 as SHARP again beat Bass.
LEONARD drove Posh back into the contest on 75 minutes but three minutes later, SHARP completed his hat-trick after more poor defending.
Posh: Bass, Lees, Woods, Khela (sub Sykut 65min), Dornelly (sub Aderoju 77min), Mills (sub Mendy 65min), Leonard, Lisbie, Shofowoke (sub Kamara 20min), Mendonca, Garbett. Unused subs: Smith, Okagbue, Hayes.
Doncaster: Lo-Tutala (sub Oram 81min), Sterry, Bailey, McGrath, Broadbent, Hanlan (sub Williams 81min), Sharp, Robinson, Senior, Grehan (sub McCann 81min), Adelakun (sub Lee 70min). Unused subs: Straughan-Brown, Swales.
Half-time: Peterborough United 0-0 Doncaster Rovers
Full-time: Peterborough United 1-3 Doncaster Rovers
Attendance: 10,192 (1,637 Doncaster Rovers fans)
Referee: Ed Duckworth
