What is a piggyback start you might ask? Well the strategy the LA Angels are trying Wednesday afternoon is one they have been using in the lower minor leagues and it involves using two starters back-to-back to hopefully pitch a whole game or at least get to the 7th or 8th inning.
This strategy is used to limit how many times a starter has to go through a batting order to two times hopefully and the reliever (who is usually a starter as well) can do the same in hopes of batters not getting too familiar with the pitcher.