Corbett will return to state-level football next year with SANFL club West Adelaide after two seasons back at his junior club.

But after a calf injury restricted the imposing young forward to just 11 games, Martyn feels this year's minor premiers can handle his departure.

Fellow tall target George Alexander, who will return to the Lions last year, was also restricted to seven matches this year, and played all those under duress with a broken ankle.

Tall wingman Jono Neville is the other loss of note from the Lions' list thus far.

"We've got a really good list as far as I'm concerned, it's just about replacing people we're going to lose," Martyn said.

"If the right person comes along that fits what we're trying to do. then you never say no either.

"It's really hard to replace someone like Riley, not just from a playing aspect but also what he does off the club.

"He's a born and bred junior and he became almost a coach for us too, plus he's one of the toughest match-ups in the competition.

"But it does fill you with confidence that we didn't have him for large portions of this year, but were still able to find avenues to goal.

"We haven't seen the best of George yet and he was out for a fair while too."

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Martyn said this year's Jim Quinn medallist, ruckman Jacob Olsson, could spend more time up forward.

"We want to get the best out of Olsso too, and we've got Dan (Foley) who would love to play more ruck this year," Martyn said.

"You've got to be pretty proactive this time of year. Key position players don't grow on trees but we don't want to break the bank for anyone, just find the right person who fits into our game plan and see what's around.

"George (Alexander) is really exciting for me, he's put on a bit more size and he might play more at full forward."

Martyn also expects small forward Kai Watts, who had a major impact on games at times this year, to improve further.

"Kai is back training with the Giants and is looking to build on what he did this year. He's proved he's probably one of the best players in the Riverina at ionly 18, so who's to say he can't replicate that on a bigger stage," Martyn said.

"He doesn't need a huge amount of touches to affect a game. We'd like him to push further up the ground too and add some further skills to his toolbag in the midfield.

"At this time of year AFL teams are screaming for a small forward. All it takes is a really solid year, so if we get some normality in the season next year and he can showcase himself at the Giants, there's no reason he couldn't progress himself in that level.

"He has to have the mindset he is a very good football player, and if he gets the opportunity to take it with both hands."

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