The Atlanta Braves pulled the trigger on another move to get a fresh arm in the bullpen. They announced Saturday morning that they had selected right-hander Carlos Carrasco to the 40-man roster. In a corresponding move, they optioned Anthony Molina to Triple-A Gwinnett. Molina heads back to the minor leagues after delivering two scoreless innings for the Braves during their comeback win over the Colorado Rockies on Friday night. He’s likely not available for the next couple of days, hence the move for another long reliever.  The pressure on the bullpen this season has required the team to cycle through a number of arms over just the first month and change alone. Twenty different pitchers have already seen the mound for the team, and the calendar just turned to May.  Last year, they used 46 total. So, they’re almost halfway there.  Injuries have been a constant issue on the pitching side.…