After not re-signing with the Canucks, Wellwood played in Russia for Atlant Moscow Oblast of the Kontinental Hockey League (KHL).

After one season with the Sharks, he signed with the Winnipeg Jets as a free agent, where he played the final two years of his NHL career.

In his second season with Belleville (2000–01), he put up 118 points, capturing the Eddie Powers Memorial Trophy as the League's leading scorer.

Wellwood recorded 55 points in his professional rookie season while also appearing in his first NHL game with the Maple Leafs that year.

[3] On pace to surpass his rookie totals, Wellwood was sidelined for almost half the season and finished with 42 points in 48 games.

[4] After the Maple Leafs had been mathematically eliminated from playoff contention, Wellwood went to Philadelphia for minor surgery on the opposite side of his groin from the first operation, prematurely ending his season with 21 points in 59 games.

[6][7] Reporting to training camp, he failed his initial fitness test and, although he passed a later evaluation,[8] he was a healthy scratch to begin the season.

On October 17, after having played just one game for the Canucks, he was placed on waivers by the team;[9] after clearing, he was assigned to the Manitoba Moose of the AHL.

Wellwood took advantage of this opportunity by scoring a goal and an assist in a 4–2 loss to the Columbus Blue Jackets, and he stuck with the club.

[14] Wellwood was sidelined early in the season, suffering a broken toe after blocking a shot from Maple Leafs defenceman Mike Komisarek in a game on October 24, 2009,[15] but he returned to the lineup just eight days later, on November 1.

After two seasons in Vancouver, the Canucks let Wellwood become an unrestricted free agent on July 1, 2010, opting instead to sign Manny Malhotra from the San Jose Sharks as their projected third-line centre.

[20] Initially it was believed that he had been released due to performance issues, but it was soon revealed that Wellwood was returning to his hometown of Windsor, Ontario, for family reasons.

[23] On January 17, Wellwood officially signed a one-year deal with the Blues,[24] but needed to clear re-entry waivers prior to joining the team.

Eric played for the Philadelphia Flyers after being selected by the team in the sixth round of the 2009 NHL Entry Draft.