In 2019, de Glanville captained Bath at the Premiership Sevens. Later in the year, he signed his first senior contract to play for the Bath Rugby senior team.[8] He made his Premiership Rugby debut against Exeter Chiefs in September 2019.[9]
In the summer of 2017, De Glanville was a member of the England under-18 team that toured South Africa and the following year, he scored two tries against Wales under-18 at Sardis Road.[10][11] He scored a try for England under-20 against Scotland in the final round of the 2019 Six Nations Under 20s Championship.[12] Later that year, he was a member of the squad that finished fifth at the 2019 World Rugby Under 20 Championship and scored a try during the pool stage against Australia.[7][13]
In October 2020, he was called up to a senior England training squad by head coach Eddie Jones.[14]
De Glanville has played in several positions in the backs. The Bath coach Todd Blackadder once said that de Glanville would play well at fly-half. However de Glanville often plays as a centre, following in his father's footsteps and having played there through several England age groups. He has also played at full-back for Bath United in the Premiership "A" League,[15] and the Premiership.[16]
De Glanville has expressed hope that his relatively low body weight may increase somewhat with age.[17]
De Glanville was one of 13 players who breached COVID-19 virus safety protocols by leaving their hotel without permission before a Barbarians game in 2020.[17][18]
