[Manny A]

Originally Posted by RKBUmp

What is this definition in MLB? Havent seen it.

This is what someone posted on the baseball discussion board. It apparently comes from the Wendlestedt Umpire School.

"In determining whether a fielder drops the ball 'while in the act of making a throw following the catch' in accordance with Rule 2.00, the umpires will determine whether the fielder obtained possession of a ball in flight but dropped the ball while in the act of making a throw during the momentum of the catch. For example, if the shortstop, in an effort to turn a double play, throws to the second baseman, who drops the ball while in the act of drawing back his arm to make a throw to first base, the second baseman shall be adjudged to have had secure control of the ball and thus the ball shall be adjudged to have been caught by the second baseman. However, it shall not be adjudged to be a catch if, while in the act of making a throw during the momentum of the catch, the fielder loses possession of the ball in the transfer (e.g., flip from the glove) before he secures the ball with his throwing hand.

"Our emphasis: The 'flip' itself is not deemed a voluntary release, even though it may be a voluntary action. This is an update you will find in the 2014 Rules and Interpretations Manual. We have removed the exclusive interpretation offered for a number of year providing that it only be an attempted voluntary release. This is no longer the case. The release must be voluntary. Additionally, this interpretation has been merged with a tag of a base as well on the front end of a double play attempt. He must secure the ball in his throwing hand before it will be deemed secure possession was made."