Transgender is also an umbrella term: in addition to including people whose gender identity is the opposite of their assigned sex (trans men and trans women), it may include people who are not exclusively masculine or feminine (people who are genderqueer, e.g. bigender, pangender, genderfluid, or agender).
Chapman holds the record for the fastest recorded pitch speed in MLB history at 105.1 mph (169.1 km/h) as well as the Guinness World Record for fastest baseball pitch for a male.
Nolan Ryan threw the ball 106 mph while playing in the MLB. MLB does not recognize radar gun speeds as an official statistic. The fastest pitch I can remember was by Joel Zumaya of the Detroit Tigers that was clocked at 103 mph. 112 by John Smoltz I'll defer to the Baseball Almanac, cited in the first answer.