 "Ghost" made his Gloucester first-team debut against Sale Sharks at Kingsholm on 10 September 2005 (18 years old), he came on as a replacement for Mike Tindall making a huge impact and turning many heads after this performance.He tore his ACL shortly after and spent the rest of the 05/06 season in recovery, after finding out he had made the England U21s squad at age 18.After this long injury lay off Jack started the 2006-07 Guinness Premiership with 2 tries in the first two home games of the season, they were both scored when he came on as a replacement.