Offer was born in Devizes, Wiltshire and played for Swindon Town as a teenager, playing in defence in each of Swindon"s FA Cup matches in 1887-1888 and 1888-1889, both of which ended in defeat, to Old Brightonians and Great Marlow respectively.
Swindon Town Royal Arsenal In September 1889, Offer moved to London to join Royal Arsenal. At this time, the club were not fully professional and played mainly friendlies and Cup matches. The following season, they entered the cup at the First Round proper, losing 2–1 to Derby County on 17 January 1891 with Offer scoring Arsenal"s goal.
In total, Offer played four times in the for Arsenal, with one goal to his name, as well as 52 appearances and 16 appearances in other first-team games.
Return to Swindon Town In February 1891, Offer moved to join Burnley, where he failed to break into the first-team, before returning to Swindon Town later that year. The next season, he scored again at Cowes in the first qualifying round on 15 October 1892, and played in the next three qualifying round matches, with Swindon going out to Marlow once again.
Southampton Offer moved to Southampton Street Mary"s in the summer of 1893 where he signed a professional contract, as the "Saints" were putting together a side to compete with the best teams. At first, Offer was played as a full-back — according to "Holley & Chalk" he was "an aggressive player (whose) enthusiasm sometimes overtook him in efforts to obtain the ball".
By the end of the 1893-1894 season, Offer had reverted to his role as a forward as the Saints reached the finals of three local cup competitions, winning the Hampshire County Cricket Club Charity Cup, defeating the Royal Artillery 5–0 in the final, with Offer scoring twice.
Foreign Southampton"s inaugural league season, Offer was part of a forward line-up including Jack Angus, Charles Baker, Fred Hollands and Herbert Ward. Saints" first league match was played at The Antelope Ground on 6 October 1894. Offer opened the scoring in a 3–1 victory over Chatham.
Saints finished third in the league with Offer scoring four goals, to bring his total for the season to ten goals from eighteen appearances.
At the end of the season, Offer retired from his professional football career and resumed his previous trade of joiner, settling on the Isle of Wight, where he died in January 1947.
They entered the FA Cup for the first time in 1889-1890, but failed to get past the qualifying rounds. Now playing as a forward, he scored one of Swindon"s goals in a 4–3 FA Cup qualifying round defeat to Luton Town on 3 October 1891. In 1894, Southampton were one of the nine founder members of the Southern League, which had been created to enable clubs in southern England, who were not admitted to the Football League to play competitive football on a regular basis. A week later, on 13 October 1894, Southampton met Newbury in the first qualifying round of the FA Cup. Saints were "in particularly rampant mood" and won 14–0, with Offer scoring twice. This is still Southampton"s biggest victory in a competitive match.
