irb(main):005:0> lineup
=> ["Northrup", "McAuliffe", "Freehan", "Cash", "Horton", "Brown", "Rodriguez", "Brinkman", "Lolich"]
irb(main):006:0> lineup.each_index
LocalJumpError: no block given
        from (irb):6:in `each_index'
        from (irb):6
        from :0
irb(main):007:0>