Morton were crowned Scottish League One champions as they recorded a 3-1 come-from-behind victory over 10-man Peterhead.The Ton fell behind but Scott Ross' dismissal proved crucial as the hosts rallied, with Michael Miller and Mark Russell both scoring in four first-half minutes and Declan McManus adding to the tally late on.The home side's promotion party did not look like materialising when Gary McDonald headed in Steven Noble's 17th-minute corner at the back post.However, just four minutes later, last man Ross saw red for hauling down McManus, with Peter MacDonald rattling the post from the resulting free-kick.Morton levelled after 36 minutes as Michael Miller's 25-yard effort arrowed into the bottom corner of the net and they went ahead shortly afterwards, Mark Russell's long-range effort deceiving Graeme Smith to find the net.McManus made sure of the three points, and the title, in the latter stages as he rounded Smith before tapping home.