By Zach Koons “The Captain” will premiere in July. View the original article to see embedded media. Derek Jeter’s upcoming documentary finally released its first teaser trailer. MLB tweeted out a 30-second clip on Sunday evening containing footage used in the six-episode docuseries. “The Captain”, directed by Randy Wilkins. The series is set to be released in July of this year and will air on ESPN and ESPN+. The trailer also teased interviews with a number of important figures from Jeter’s era of baseball. The list of those expected to make appearances in the documentary includes Mariano River…