Reading won its game with a walkoff homer.
The 24-year-old righthander threw 20 more off-speed pitches Friday night, six of them for swings and misses.
The surging pitcher allowed just five hits, struck out nine, walked two and allowed just one run as he logged seven innings for the fifth time in his last six starts.
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The Phils' third baseman is 11-for-25 with five extra-base hits since the all-star break.
Kendrick might not be a Phillie for long, though.
"How do you ever know when you're actually ready?" he said.
Pedro Florimon homered twice for Lehigh Valley
Crawford, since returning June 20 from the disabled list, is starting to look like the prospect who scorched through the lower levels of the minors.
There might not be another Cole Hamels en route to Citizens Bank Park, but there are some good lefthanded arms pushing their way to the majors.
Mike Schmidt and Maikel Franco has similar offensive numbers at similar stages early in their careers, and, as the trade deadline approaches, Franco is showing signs of surging as Schmidt did.
Opponents have hit .226 with a .384 slugging percentage against his fastball. The quality, not just the speed, has risen.
Scott Kingery and Dylan Cozens have RBI singles in the ninth.
Nick Williams tripled twice, and the Phils' hit total was their highest in a game since June 2013.
Altherr suffered a "mild-to-moderate" strain of his hamstring. He will miss three or four weeks.