a half-inning ending). Since baseball provides natural breaks in the action when teams exchange offensive and defensive roles between half-innings (two minutes, five seconds normally; two minutes and twenty-five seconds for nationally televised games), TV timeouts are not necessary. Other than coaching visits, which the umpires ensure stay brief, timeouts theoretically have no time limits. However, when no runners occupy a base, a pitcher must deliver the pitch within twelve seconds of receiving the ball from the catcher or else a "delay of game" is called, resulting in a ball. Also, any relief pitcher is limited to eight warm-up throws before play resumes, except in special circumstances (such as a pitcher substitution due to injury). Though not officially recognized as a "timeout", a stoppage in play can also be requested by the defense. This can be accomplished in several ways. First, once in his "set" position, the pitcher may stop play by stepping off the rubber prior to his windup. Secondly, the catcher may visit the pitcher at any point before he steps on the rubber. Finally, the manager or pitching coach may also visit the pitcher before he steps on the rubber (called a "coaching visit"). Under MLB rules, a team is limited to one visit per inning and a maximum of three per game. Under NFHS (high school) rules, a team receives three mound visits for the game and can use more than one an inning. If a team exceeds the limit in either MLB or high school ball, the pitcher must be removed immediately. Basketball NCAA In the National Collegiate Athletic Association (NCAA), there are two systems of timeouts used. In games that are not broadcast, each team is allowed four 75-second and two 30-second timeouts per regulation game. In games which are being broadcast, as of the 2015-16 season, each team is granted one 60-second timeout and three 30-second timeouts per game in addition to the media timeouts (at the first dead ball under 16, 12, 8 and 4 minutes remaining in each half). A maximum of two 30-second timeouts may carry over into the second half. Any called timeout that occurs within the 30 seconds prior to a scheduled media timeout break automatically takes the place of the upcoming media timeout, with the only exception to this rule being the first called timeout of the second half. A timeout cannot be called by a coach