North Launceston midfielder Mark Walsh and Launceston ruckman Hamish Leedham have taken different paths to the milestone, which they will reach at home and away respectively.

A three-time premiership Bomber, Walsh joined Zach Burt in departing for the NTFA after the 2018 flag despite both sitting on the precipice of TSL milestones.

Returning in the off-season after helping break Hillwood's NTFA flag drought, Walsh will tick over to three figures on Saturday, while Burt will reach 150 games and life membership shortly after the round three bye.

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Walsh was named on a half-back flank, however North Launceston coach Taylor Whitford said the 26-year-old would play predominantly through the midfield this year.

"He played a little bit at half-back for us late in 2018 and played some really good footy there, he's such a good kicker," Whitford said.

"Him and Ollie Sanders would be our two best kicks for sure, but he's had a really good pre-season, he's nice and fit so he'll play on ball and we'll use his contested work.

"He's really good inside the contest."

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Leedham has been a staple of the Blues' line-up in recent years and single-handedly shouldered the ruck role for much of last season.

The 24-year-old will do so again in game 100 despite the Blues' bulging ruck stocks, with Tim Auckland named as an emergency and two-time premiership Blue Joe Groenewegen absent from the team sheet.

Blues coach Mitch Thorp said Leedham was a popular teammate who still had his best footy ahead of him.

"Poor old Hamish had to do the lion's share himself last season, so to have two more ruckmen added to the list just gives him a bit of support and gives us some flexibility in front of goal to be a bit taller," Thorp said.

"Hamish will continue to ruck, we'll potentially go with Tim Auckland in front of the ball as another key forward with myself and look to throw Jamo House back behind the footy."