|Which university are you at? pharma 101 In his presentation of the new system to the media in Cooperstown last week, Atlanta Braves president John Schuerholz was a little vague as to how much time managers would have to issue a challenge, other than to say it would be made verbally to the home plate umpire or the nearest umpire within earshot. Also vague was how it could be determined a manager was running out onto the field to protect a player from being tossed for arguing a play on the basepaths, and not violating the rule prohibiting him from coming onto the field to argue a call. According to an MLB official, Thursdayรขยยs presentation of the new system was merely the basics and that there will be refining of it in meetings with owners, managers, umpires and the players union in the weeks to come. Supposedly, the challenges are supposed to be made before the next play or pitch.