Yorkshire could create history on Sunday if teenager Matthew Fisher features in their Yorkshire Bank 40 clash with Leicestershire.
Fisher is aged just 15 years and 212 days, and he would become the youngest post-war cricketer to play in a domestic first-class competition if he is selected for the encounter at Scarborough.
The seamer claimed figures of 6-25 for the Yorkshire 2nd XI against Leicestershire last week, earning him his first call-up to a senior squad.
"I could never imagine at the start of the season that I would be named in the first-team squad," Fisher told The Sun.
"It's unbelievable. When I found out, I was very proud and emotional. I was smiling from ear to ear. My target at the start of the year was to get one or two second-team games -- I've already surpassed that."
Former Australia paceman and Yorkshire coach Jason Gillespie added: "Matthew deserves his call-up into the squad.
"We monitor the progress of all our players and the feedback I have received from (second-team coach) Paul Farbrace on the way Matthew has been playing has been excellent.
"He is very young, but he has the ability to be successful if he is selected on Sunday."
Yorkshire wicketkeeper Barney Gibson was 15 years and 27 days old when he played against Durham University in April 2011, but he has yet to feature in a major domestic competiton.