[4] Bayly made his full debut in the final game of the 2006–07 Championship season away to Derby County.
He made his League debut on the opening day of the 2009 season against Waterford United[5] In an extraordinary season he scored the goal that clinched Sporting's promotion to the Premier Division against Bray Wanderers in a play-off[6] and then six days later won his first senior medal winning the FAI Cup at Tallaght Stadium following Fingal's 2–1 victory over Sligo Rovers.
[9] He scored Rovers' equaliser in the UEFA Europa League tie against Bnei Yehuda Tel Aviv F.C.
[12] He scored his first goal for the club against Shelbourne on 25 April in an EA Sports Cup tie at Tolka Park.
He made his debut for the Midlands club the very next day in a 3–1 away win over SD Galway at Eamon Deacy Park.
He scored a long range stunner as they gave the runaway league leaders a very good game but a late flurry of Limerick goals saw them run out 5-1 winners.