Known for his spectacular marking ability in the full-forward position,[2] Modra had the physical strength and size to match the best opposition full-backs in the competition.

He moved to Loxton, South Australia, at age 11 with his parents (Douglas and Valerie) and four older siblings (Kerry, Kym, Rick and Joanne).

Modra lead the team to win the 1990 Riverland Football League in a grand final replay after drawing with Waikerie the previous week.

In 1991, Modra attempted to move to Red Cliffs in the Sunraysia Football League and played one pre-season game for the club, kicking 13 goals on newly Sydney-drafted Darren Holmes.

At first, his potential at full-forward was overshadowed by senior player Scott Hodges, who had a reputation as a prolific goalkicker in the SANFL with Port Adelaide Football Club, having broken the record for most goals in a season in 1990 when he kicked 153.

Since 2003, Modra has worked as a cattle farmer on his property at Waitpinga, near Victor Harbor, with his family, wife Erica and two children, Hayley May and Luke.

[citation needed] In his first senior premiership since he was 21, Modra kicked 8 goals in Keith's win over Penola in the KNTFL Grand Final played at Naracoorte on 15 September 2007.

[7] On 3 October 2011, Modra—along with other former AFL and SANFL stars such as Andrew and Darren Jarman, Gavin Wanganeen, Mark Ricciuto, Ben Hart, Mick Martyn, Brendan Fevola, Matthew Lloyd and Dermott Brereton—played in the State of Origin Slowdown match at the Adelaide Oval between South Australia and Victoria.

The match was played for charity for the Little Heroes Foundation and saw South Australia winners 17.10 (112) to Victoria's 17.9 (111) courtesy of a goal 20 seconds from the final siren by Darren Jarman.

In late 2021, Modra made the move to Queensland, where he linked up with his old Fitness Coach Karli Owen, who ran him through a rigorous six-month program that allowed him to return to South Australia and take up a role within the Glenelg Masters.