Answer based on context:

After their huge win over the Texans, the Jaguars stayed home for a game against  the Colts.  The Colts scored first with Kenton Keith scoring a touchdown on a 3-yard run making it 7-0.  In the 2nd quarter, the Colts increased their lead with Peyton Manning rushing for a 1-yard touchdown to make it 14-0 and then Adam Vinatieri scored a 36-yard field goal to make the score 17-0 at halftime.  Coming back into the game, the Jags finally managed to get on the board with Maurice Jones-Drew running for a 1-yard touchdown to dip the lead to 17-7.  However, the Colts then went ahead 19-7 when Jaguars backup QB Quinn Gray was sacked in the end zone.  In the last quarter, Vinatieri scored a 20-yard field goal to make the score 22-7 then wrapped the game up with Peyton Manning's 35-yard touchdown pass to Dallas Clark, dropping the Jags to 4-2 on the season.

How many yards did Keith score?
3