That is the total number of pitches faced by the two PUs in the two marathon games in MLB yesterday!
Afonso Marquez faced
553 pitches in the 20 2-1 Marlins win at Citifield, while Bruce Dreckman was a relative slacker by facing 'only'
528 in Toronto's 4-3 17 innning win of Texas. - Just typing that makes me want to pop an Advil!
In the past, I believe MLB has given the PUs in games like that the chance to take a day off. Lets see if either one of those two is on the field today..