He was drafted in the fourth round of the 2003 NFL Draft out of Iowa State University.
It is widely thought his draft value dropped because of his insistence that he play quarterback for the team, rather than wide receiver.
Intrigued by his athleticism, the Seattle Seahawks gave him that chance.
Wallace made his mark in the 2005 NFL Playoffs when he caught an acrobatic 28-yard pass from Matt Hasselbeck in the NFC Championship game against former Seahawks cornerback Ken Lucas of the Carolina Panthers.

In 2006, Wallace started in four games as quarterback after an injury to Hasselbeck's right knee.
Under his leadership, the team won two games and lost two.
His passer rating was 76.2 for the 2006 season, passing just under 1,000 yards, throwing 8 touchdowns and 7 interceptions.

In 2007, Mike Holmgren began using Wallace as a wide receiver in limited formations.
By Week 7, Wallace had caught two passes, run two end arounds, and thrown an incomplete pass on an end around option pass.

In 2008, Wallace started two pre-season games at quarterback and had good statistics against the Minnesota Vikings and Oakland Raiders.
After injuries to wide receivers that hurt the Seattle Seahawks, Wallace was moved to that position but strained a calf in his first game.

After the injury of Hasselbeck, he returned as a starter in week seven of the season at Tampa Bay, where the team lost 20-10.
The next week, he led his team to a 34-13 win over San Francisco.
In week 9, Wallace threw for the longest touchdown pass in Seattle Seahawks franchise history with a 90-yard completion to Koren Robinson in the Seahawks' first play from scrimmage.
However, the Seahawks lost to the Philadelphia Eagles, 26-7.
Wallace played again in the 21-19 road loss to the Miami Dolphins in week ten.
Hasselbeck was cleared by team doctors to play and was the starter again for week 11.
Because of another injury to Hasselbeck, Wallace started in week 14 against the New England Patriots, where he threw 20 completions in 28 attempts for 212 yards and three touchdowns.
 His passer rating for the game was 128.9.
He also ran for 47 yards on three carries.
However, a lost fumble by Wallace late in the fourth quarter led to a 24-21 Seahawks loss.
The following week, he captured his second win as a starter as the Seahawks beat the St. Louis Rams 23-20 at the Edward Jones Dome.
Hasselbeck returned from injury, but Wallace remained the starter for the rest of the season.
Wallace had another good performance in a victory against the New York Jets in week 16, but lost to the eventual NFC champion Arizona Cardinals in week 17.

In his limited action, Wallace ended the 2008 NFL season as the league leader in Passing Touchdown to Interception Ratio, with 3.67.
He was drafted in the fourth round of the 2003 NFL Draft out of Iowa State University. It is widely thought his draft value dropped because of his insistence that he play quarterback for the team, rather than wide receiver. Intrigued by his athleticism, the Seattle Seahawks gave him that chance. Wallace made his mark in the 2005 NFL Playoffs when he caught an acrobatic 28-yard pass from Matt Hasselbeck in the NFC Championship game against former Seahawks cornerback Ken Lucas of the Carolina Panthers.
In 2006, Wallace started in four games as quarterback after an injury to Hasselbeck's right knee. Under his leadership, the team won two games and lost two. His passer rating was 76.2 for the 2006 season, passing just under 1,000 yards, throwing 8 touchdowns and 7 interceptions.
In 2007, Mike Holmgren began using Wallace as a wide receiver in limited formations. By Week 7, Wallace had caught two passes, run two end arounds, and thrown an incomplete pass on an end around option pass.
In 2008, Wallace started two pre-season games at quarterback and had good statistics against the Minnesota Vikings and Oakland Raiders. After injuries to wide receivers that hurt the Seattle Seahawks, Wallace was moved to that position but strained a calf in his first game.
After the injury of Hasselbeck, he returned as a starter in week seven of the season at Tampa Bay, where the team lost 20-10. The next week, he led his team to a 34-13 win over San Francisco. In week 9, Wallace threw for the longest touchdown pass in Seattle Seahawks franchise history with a 90-yard completion to Koren Robinson in the Seahawks' first play from scrimmage. However, the Seahawks lost to the Philadelphia Eagles, 26-7. Wallace played again in the 21-19 road loss to the Miami Dolphins in week ten. Hasselbeck was cleared by team doctors to play and was the starter again for week 11. Because of another injury to Hasselbeck, Wallace started in week 14 against the New England Patriots, where he threw 20 completions in 28 attempts for 212 yards and three touchdowns.  His passer rating for the game was 128.9. He also ran for 47 yards on three carries. However, a lost fumble by Wallace late in the fourth quarter led to a 24-21 Seahawks loss. The following week, he captured his second win as a starter as the Seahawks beat the St. Louis Rams 23-20 at the Edward Jones Dome. Hasselbeck returned from injury, but Wallace remained the starter for the rest of the season. Wallace had another good performance in a victory against the New York Jets in week 16, but lost to the eventual NFC champion Arizona Cardinals in week 17.
In his limited action, Wallace ended the 2008 NFL season as the league leader in Passing Touchdown to Interception Ratio, with 3.67.
Seneca Wallace