1) To surpass in throwing 
• (v. t.) To excel in throwing, as in ball playing. • (v. t.) To throw out.
Out·throw' transitive verb 1. To throw out. Spenser. 2. To excel in throwing, as in ball playing. 
to throw out or extend: His arms were outthrown in greeting. · to surpass in throwing; throw farther or more accurately than: He can outthrow any other pitcher in the league.