At PBA50 World Series of Bowling III last year in Jackson, Michigan, Hall of Famer Mika Koivuniemi made the stepladder finals in all four tournaments. At PBA50 World Series of Bowling IV that is going on now at AMF Southtown Lanes in Bloomington, Minnesota, Koivuniemi was the top seed after Ballard Championship qualifying on Sunday, but lost to John Janawicz to miss the stepladder, and fell out of stepladder contention after a solid first block in the Petraglia Championship on Tuesday....