HOUSTON — The Houston Astros’ farm system is still depleted, a byproduct of trades, graduation and the lack of a first- or second-round draft pick in 2020 and 2021. Tier 1: Moving on up Jake Bloss, RHP Current assignment: Double-A Corpus Christi Keith Law ranks: 12th on Astros’ Top 20 Bloss is becoming one of the fastest-rising pitching prospects in …