The 25 year old scrum-half moved to the senior set-up at the start of season 2012/13 after completing two years in the Munster Academy, and he made his league debut in February 2013 against Edinburgh in Musgrave Park.
Sheridan went on to make this Heineken Cup debut against Gloucester in October, making his first start at European level in Munster's dramatic 18-17 victory away to Perpignan. He will make his 20th appearance for Munster tonight in Ravenhill.
Similarly versatile prop John Ryan is in line to claim his 20th cap for Munster if sprung from the bench for tonight's Ulster encounter.
The Cork native has represented Munster at Schools, Under 19 and Under 20 level, and played with the International Club XV side in 2011 and 2012. He travelled to Georgia as part of the Emerging Ireland squad for the Tbilisi Cup during the summer.
Ryan made his Munster debut as a substitute away to Cardiff Blues in September 2011 and made four more appearances off the bench that season before moving to London Irish on a loan for the opening games of the 2012/13 campaign.
The 25 year old prop started his first game for Munster against Zebre in the final game of last season and has continued his progression this term having featured in seven games already. He made his Heineken Cup debut against Racing Metro in Thomond Park in January 2013.
Fellow prop and Cork man James Cronin has exploded on to the scene this season, playing in 14 games and scoring three tries.
A product of the Munster Youths system Cronin made the move to senior level at the start of the 2013/14 season after completing two years of the academy programme, during which time he impressed at A level. He finished last season with two Rabo appearances, making his senior debut against Leinster in Thomond Park in April.
The 23 year old made his Heineken Cup debut against Edinburgh in Murrayfield in October and his first start at European level was away to Perpignan in December.
Head Coach Rob Penney was particularly pleased with the news of the confirmed signings and said, "It's great to have these young guys commit their talent and future to Munster. It just shows once again the hard work that is being done at grass-roots and underage level for guys of this level to break through and it's a good thing for the province."
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