He played Gaelic football with his local club Beaufort and was a member of the Kerry senior inter-county team from 1968 until 1976.
He won a Munster Minor Football Championship medal after a 3-11 to 1-05 win over Cork in the final.
For the following two years Brendan had moved outfield to his customary half-forward berth, but the Kingdom were beaten narrowly by the Rebels in both Munster finals of 1966 and 1967.
[5] Lynch joined the Kerry senior during the 1967–68 National Football League playing in final game against Mayo.
[6] He later joined the senior making his Munster championship debut against Tipperary scoring two points in a 0-17 to 2-07 win.
[7] He played in all of Kerry's 1968–69 National Football League including the final win, where he scored 1-03, after a replay against New York.
They faced Mayo in the final where three points from Lynch seen him pick up his second League medal in three seasons.
[11] Things looked good as four points from Lynch see Kerry overcome Waterford in the Munster semi-final.
[13] In the drawn All-Ireland final of 1972 he gave possibly his best ever performance scoring 1-7 as Kerry drew with Offaly, before losing out in the replay.