Complex sentence: Invited to Spring Training by the Mariners in 2014, Elias competed for a rotation spot on the Mariners' opening day roster, making the team as one of the starting pitchers.
Split into simpler sentences: Invited to Spring Training by the Mariners in 2014, Elias competed for a rotation spot on the Mariners opening day roster. He ended up making the team as one of the starting pitchers.