Tyler and Portzline occupying the top two spots was a repeat of last year's season opener in which Tyler shot a 65 to beat out Portzline who carded a 74.
For Tyler, the back nine represented a shift in his play. The senior and two-time defending District 4 champion started off with a 37 on the front nine, making the turn at three-over par with four bogies and a birdie.
The lefty parred four straight holes, including barely missing a birdie chance on the 12th hole, but made the most of his opportunity on a difficult 14th hole.
With the hole sloping uphill, forcing players to hit a tougher shot to reach the green, Tyler and his playing partners, Selinsgrove's Colin Rice and Williamsport's Marc McClain, each reached the green with a chance to at least make par.
Tyler reached the green in two shots while Rice used a solid drive off the tee that reached the fairway to tap in for par minutes later. McClain was able to sink a putt for a bogey on the hole.
"(The birdie) definitely helped," Tyler said. "It kind of got me going. I was waiting for that."
"When you have a few bad holes, especially when it's a team event, you gotta just battle back and try to get it going," Tyler added. "That's what I was able to do."
Tyler finished his round with three straight pars. On a hole with a par of four or five, Tyler shot one-under par, driving well on the longer holes.
With Tyler and Portzline leading the way, the Braves were able to start their season on the right foot. D.J. Clark shot an 89 and Raven Fatool carded a 91 to round out the Braves' foursome.
"I'm just happy with all the kids," Ernie Tyler said. "It was their first time to play here and they went out and played, did a nice job."
Rice carded an 80 on the day to finish in third place. Rice finished his round in a flurry, birdieing 17 and 18. Rice's teammate, Logan Sears finished in fourth with an 84. Aidan Edmiston rounded out the top five with an 85.