The Rangers placed Leiter on the development list at Double-A Frisco on Friday, Jeff Wilson of RangersToday.com reports.
The organization says Leiter is fine physically, but it wants the right-hander to work on his mechanics after a pair of ugly starts with Frisco following his June 30 return from a prior stint on the development list. There is no timeline for his return this time around. Leiter has a 5.51 ERA and 1.51 WHIP with Frisco this season -- a disconcerting lack of progress for the 2021 second overall pick.