abc's robin roberts caught up with mariano riviera to find out the incredible story behind the makingf a legend. >> a 13-time all-star, five-time world champion and major league baseball's all-time saves and e.r.a. leader. but the greatest closer in major league history grew of in panama with little. he worked on a fishing boat, the captain his father. riviera hoped maybe to go to mechanics school. but fate intervened one day. when he was playing baseball for an adult league. >> you weren't even a pitcher. >> i wasn't supposed to be pitching in that game. i wasn't supposed to pitch period. >> there is a remarkable story. mariano lays it all out in his mome memoir" the closer." >> you signed for $2,000. >> that's it. >> when he made his way to the u.s. to pursue a dream he didn't even speak english. what was it like getting that call to the big leagues? look at you light up thinking about it again? >> i was jumping in bed. jumping on top of the bed like a little kid. i will never forget that moment. >> and he never looked back. becoming not only a transcendent pitcher and beloved teamm