Rick Porcello sinker usage by season:
2009: 77%
2010: 70%
2011: 65%
2012: 67%
2013: 61%
2014: 57%
2015: 66%
In 2014, his best year in MLB, he threw the least sinkers of his entire MLB career. Last year he was actually more sinker-reliant than any year in the last three seasons. Also, Porcello's main problem last year was a change in pitching philosophy and sequencing (why change what worked?). Last but not least, per pitch value, Porcello's sinker has been a plus pitch for the last three years (with 2015 being the worst of course). But yet again, this is another instance where jung doesn't take the thirty seconds needed to actually check numbers, and spouts a bunch of made-up crap. Par for the course.