Guys I just found a pretty interesting thing in career mode. You can nearly train your bowling upto infinity in training specially by stump marker training.... u just need to hit any of those 8 circles to keep on scoring.. and if hit the yellow one, more multiplier.. if you are any pacer you can just keep bowling inswinging yorkers (with slow pace) to hit the bottom-centre right circle.... and outswinging yorker (also slow pace) to hit the circle to left to it (bottom-centre left) ... keep repeating and you will have lot of xp and bowling xp with you