Nelson was optioned to Triple-A Lehigh Valley on Saturday, Matt Gelb of The Athletic reports.

The Phillies recalled Nelson from Triple-A Lehigh Valley on Sunday.

The Phillies optioned Nelson to Triple-A Lehigh Valley on Wednesday.

Nelson was recalled from Triple-A Lehigh Valley on Sunday.

Nelson will be called up to start the final game of the regular season Saturday against the Mets, Scott Lauber of The Philadelphia Inquirer reports.

Nelson (hamstring) was activated from the injured list Friday at Triple-A Lehigh Valley, Tom Housenick of The Morning Call reports.

Phillies manager Rob Thomson said Nelson suffered a left hamstring injury during his start Saturday with Triple-A Lehigh Valley, Todd Zolecki of MLB.com reports.

Nelson (hamstring) was activated from the 15-day injured list Thursday and optioned to Double-A Reading.

Nelson (hamstring) made the fourth appearance of his rehab assignment Tuesday with Double-A Reading, tossing five innings and striking out four while allowing an unearned run on six hits and no walks.

Nelson (hamstring) will begin a rehab assignment Tuesday with Single-A Clearwater.