In sports broadcasting, a sports commentator (also known as sports announcer or sportscaster) provides a real-time commentary of a game or event, usually during a live broadcast, traditionally delivered in the historical present tense. Radio was the first medium for sports broadcasts, and radio commentators must describe all aspects of the action to listeners who cannot see it for themselves. In the case of televised sports coverage, commentators are usually presented as a voiceover, with images of the contest shown on viewers' screens and sounds of the action and spectators heard in the background. Television commentators are rarely shown on screen during an event, though some networks choose to feature their announcers on camera either before or after the contest or briefly during breaks in the action. Types of commentators Main/play-by-play commentator The main commentator, also called the play-by-play commentator or announcer in North America, blow-by-blow in combat sports coverage, lap-by-lap for motorsports coverage, or ball-by-ball for cricket coverage, is the primary speaker on the broadcast. Broadcasters in this role are adept at being articulate and carry an ability to describe each play or event of an often fast-moving sporting event. The play-by-play announcer is meant to convey the event as it is carried out. Because of their skill level, commentators like Al Michaels in the U.S., David Coleman in the UK and Bruce McAvaney in Australia may have careers in which they call several different sports at one time or another. Other main commentators may, however, only call one sport (Mike Emrick, for example, is known almost exclusively as an ice hockey broadcaster). The vast majority of play-by-play announcers are male; female play-by-play announcers had not seen sustained employment until the 21st century. Radio and television play-by-play techniques involve slightly different approaches; radio broadcasts typically require the play-by-play host to say more to verbally convey the on-field activity that cannot be seen by the radio audience. It is unusual to have radio and television broadcasts share the same play-by-play commentator for the same event, except in cases of low production budgets or when a broadcaster is particularly renowned (Rick Jeanneret's hockey telecasts, for example, have been simulcast on radio and television since the late 1990s). Analyst/color commentator The analyst or color commentator provides expert analysis and background information, such as statistics, strategy on the teams and athletes, and occasionally anecdotes or light humor. They are usually former athletes or