Says MLB.com:

The Phillies took right-handed pitcher Roy Thomas in the first round of the 1971 Draft out of the California high school ranks and he went on to spend parts of eight seasons in the big leagues, though none of them with the Phillies.

But they really struck gold in Round 2, getting Ohio University shortstop Mike Schmidt.

He moved to third and was in the big leagues by September of 1972, the start of his illustrious Hall of Fame career.

The Phillies also found big leaguers in the eighth round with Mac Scarce and the first round of the June secondary draft this year with Dane Iorg.

https://www.mlb.com/phillies/news/best-mlb-draft-classes-for-each-team