PORTLAND, ME - APRIL 21: Portland vs Biddeford baseball. Thomas Joyce of Portland leads off the seventh inning with a double to center field. (Photo by Derek Davis/Staff Photographer)

Portland teammates swarm Jacob Knop after he hit a walk-off line drive in the seventh inning of their opener against Biddeford on Thursday at Hadlock Field. Derek Davis/Staff Photographer

Portland teammates swarm Jacob Knop after he hit a walk-off line drive in the seventh inning of the opener against Biddeford. Derek Davis/Staff Photographer

PORTLAND, ME - APRIL 21: Portland vs Biddeford baseball. Jacob Knop of Portland can't reach a high throw as Colin Lavigne of Biddeford steals second base in the sixth inning. Lavigne would go to steal third and then home, giving Biddeford the lead, but Portland tied it in the bottom of the sixth inning and then won with a walk-off hit by Knop in the seventh. (Photo by Derek Davis/Staff Photographer)

It's time to celebrate for Portland's baseball team, which opened the season by beating Biddeford. Derek Davis/Staff Photographer

PORTLAND, ME - APRIL 21: Portland vs Biddeford baseball. Charles Barnard of Portland pitches in relief during the sixth inning. (Photo by Derek Davis/Staff Photographer)