In the summer of 2014, Keenan played in a pre-season friendly against a Sunderland XI and subsequently made his first team league debut the following month, replacing the injured Jordan McMillan in the early stages of a 1–1 draw against Dundee at Dens Park on 16 August 2014. Dale put in a brave performance as 10 man Thistle managed to salvage a well earned point. He made his first league start for Partick Thistle on 23 August 2014, at Firhill against Hamilton Academical.
