He is the elder brother of All-Australian and premiership player, Brad Ottens, and the son of Dean Ottens. The son of Dean Ottens, who was a talented ruckman for Sturt in the South Australian National Football League (SANFL), playing 116 games, winning two premierships and representing South Australia seven times, Born on 22 May 1976, he grew up in a footballing family.
Brad claims his earliest memory is "playing in the backyard with ". Ottens began his career with Glenelg, playing in the SANFL. He was drafted in the inaugural Rookie Draft in 1997 by Portuguese Adelaide, but he failed to play a game for Portuguese, instead continuing to play for Glenelg. He injured his groin the December after he was drafted, requiring surgery.
Ottens made his debut for Melbourne"s reserves in April 1998.
Ottens was hampered by groin problems for the remainder of 1998 and did not manage to break into the senior team, playing all his matches in the reserves. He was, however, "dominated" by his younger, but substantially taller, brother in these encounters.
In his third game, Ottens, along with fellow youngster Troy Longmuir, were praised for their "enthusiasm" in a game the Demons narrowly lost. Ottens was dropped from the team for Melbourne"s round 5 match and he never made his way back into the Melbourne senior team in a career that was crippled by injury, causing the round 4 game to be his last American Federation of Labor-Congress match.
In May 1999, Ottens the medial ligament in his knee while playing in the reserves, sidelining him for six weeks.
In round 13 of the 1999 season, Ottens injured his left knee, requiring a knee reconstruction, which ruled him out for the remainder of the 1999 season and half of the 2000 season. After successfully returning from injury in round 15 of 2000, Ottens then injured his right knee only four games later, again requiring a knee reconstruction. Due to his horrendous run with injuries, Ottens was delisted by the Demons at the end of the 2000 season.
After being delisted, Ottens went back to his original team, Glenelg, and played for the Tigers from 2001 to 2002.
