MLB commissioner Rob Manfred addresses pitch clock, payroll concerns Unknown 00:13 A 20-second pitch clock was implemented at the Double-A and Triple-A level in 2015. Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsMiami Open: World No 6 Dominic Thiem forced to withdraw from tournament due to ankle injuryJurgen Klopp Expects Liverpool to Bounce Back after United LossTigermania Returns to the PGA TourIndian Wells Masters: Roger Federer wins 16th straight match to reach semi-final; Borna Coric upsets Kevin AndersonFormer Real Madrid and Liverpool midfielder Xabi Alonso could face eight years in prison for alleged tax fraudAll England Open 2018: PV Sindhu, HS Prannoy enter quarter-finals; Kidambi Srikanth suffers narrow loss