Yep, 25 by the end of this season, he's not exactly a kid anymore, in comparisson to say other youngsters, off the top of my head, Raheem Sterling who's gametime has been curtailed by Rodgers protecting him his first few years, has averaged higher ratio's than Rafael already at the age of 19, even Luke Shaw who's had a glut of injuries this year at 19 put in 25 league appearances his first year (17 years old) and 35 his second (18 years old) at Southampton for example,
Id like to compare Rafaels average minutes on the pitch per season to someone like Darren Andertons, with his consumate "sick note" tag, but I'm too lazy to go try and hunt down the numbers.