One way to get called up earlier

[KSUmob1_MLBTS]

I played through my first season building my attributes to a 68 rating. Then I restarted a new RTTS and I was able to start off in my first season at 68 rating, I continued to play building up my attributes (made sure to buy equipment and archetypes that made me a 75) and was called up after the all-star break my first year.