Oldham Athletic fell to a defeat at Boundary Park as they were beaten 0-2 by Portsmouth, leaving Latics 19th in League One.
Manager Richie Wellens implemented two changes to the side which drew with Bury last weekend as Eoin Doyle came in for his first start since Doncaster Rovers in December and Ryan McLaughlin also started the fixture.
Pompey boss Kenny Jackett made two changes from the side beaten at home by Gillingham the previous week. Pitman returned from a three-game injury absence to skipper the side, while Brandon Haunstrup also started, as Christian Burgess and Sylvain Deslandes dropped to the bench.
It was a quiet opening to the game with both sides struggling to create clear cut goalscoring opportunities.
Craig Davies felt he should have been awarded a spot kick early into the game but the referee remained unmoved, however, at the other end, Kal Naismith headed over from 10 yards.
A quick break presented Oldham with their best chance of the half, only for former Fratton loanee Eoin Doyle to stab his shot straight at Luke McGee.
Jamal Lowe soon had an opportunity at the other end, bursting between two defenders and seeing an effort deflected wide.
The visitors took the lead just before the half hour mark through Pitman. The striker rose highest from a cross into the box from Conor Ronan and it beat Johny Placide to put Pompey ahead (0-1).
The goal came against the run of play but it did give the visitors a lift and they did go on to extend their lead on 42 minutes.
It was an error from Johny Placide that led to the goal as the ball ended up at the feet of Pitman who rolled the ball into an empty goal to extend Portsmouth’s lead going into half time (0-2).
Half Time – Oldham Athletic 0-2 Portsmouth (Pitman 29’, 42’)
Latics were given an opportunity to get back into the contest straight after the restart, when Clarke was booked for a foul on Craig Davies.
Kean Bryan took the free-kick from just outside the Blues box and although his effort went through the wall, it was straight into the arms of McGee.
Wellens made changes in a bid to get back into the game and brought on Patrick McEleney and Aaron Holloway to add to their fire power in attack.
However, the game was to be stopped just after the hour mark for eight minutes as the conditions at Boundary Park took a turn for the worst.
When the action resumed, Doyle then had a couple of shots saved by McGee as the hosts tried to find a route back into the contest.
The second was closest to finding the net, with Pompey’s keeper just about getting his fingertips to it and diverting the ball over.
And McGee also dealt with a low drive from substitute Duckens Nazon, as time started to run out for Oldham.
Latics had to be wary of the counter attack as Naismith managed to knock the ball beyond Placide but Dummigan was back on the line to clear the danger.
Deep into additional time, Pompey could have extended their lead further but Lowe’s effort smashed against the post on an afternoon to forget for Latics.
Full Time – Oldham Athletic 0-2 Portsmouth (Pitman 29’, 42’)
Oldham Athletic – Placide, Dummigan, Wilson, Bryan, Moimbe (80’), McLaughlin (55’), Fane, Gardner, Byrne, Davies (58’), Doyle.
Subs – De La Paz, Edmundson, Hunt, Pringle, McEleney (55′), Holloway (58′), Nazon (80′).
Portsmouth – McGee, Walkes, Clarke, Pitman, Ronan, Whatmough, Donohue, Lowe, Naismith, Close, Haunstrup.
Subs – Bass, Burgess, Kennedy, Chaplin, Deslandes, May, Widdrington.
Attendance: 4,306 (767 visiting supporters)