Rockies center fielder Charlie Blackmon has changed representation and is now a client of the ACES agency, reports ESPN’s Jerry Crasnick (Twitter link). The move comes at a crucial time for Blackmon, who is eligible for arbitration once more this winter before reaching free agency next winter. Blackmon’s new reps’ first order of business will be to engage the Rockies in negotiations on his next contract. Odds are, the sides will focus first on avoiding arbitration. MLBTR predicts that Blackmon will nearly double his 2017 salary of $7.3MM, with the algorithms projecting a $13.4MM arb value. Of course, the opportunity to chat might also lead to some exploration of a longer-term deal. Blackmon will turn 32 next summer, so he’s not as youthful as fellow mid-arb star Nolan Arenado.