RICHMOND has shored up its ruck stocks, with Ivan Soldo and Mabior Chol both signing two-year deals.

The pair were out of contract at the end of the year, with Chol qualifying for unrestricted free agent status as he was previously delisted by the Tigers before being re-drafted as a rookie.

The deals will tie the big men to the club until the end of 2021, with Chol being retained as a rookie.

Soldo, 23, has impressed after stepping in as the No.1 ruckman for the injured Toby Nankervis, playing 11 games so far, averaging 27 hitouts, 10 disposals at 76 per cent efficiency and three tackles a match.

The cousin of former Tiger and current ruck coach Ivan Maric, former basketballer Soldo was originally signed as a Category B rookie in 2014, and also has a soccer background.

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The 22-year-old Chol has had a career-best year, breaking into the side in round 13 and playing nine consecutive games after playing just one AFL match back in 2016.

"We're really pleased with both Ivan and Mabior's development so far, they've worked really hard with their coaches and teammates to continue to improve," Richmond list manager Blair Hartley said.

"They're both great competitors and important contributors to our team, and we look forward to watching them develop further in the next couple of years."