The Padres have now signed 11 of the 14 players they selected in the first 10 round of the First-Year Player Draft, which was held earlier this month.
Baltz, the No. 68 overall selection, signed for $625,000. The assigned value for that pick was $757,900.
On Friday, the Padres signed their top pick, left-handed pitcher Max Fried, for $3 million. That was the assigned value for the No. 7 overall pick.
On Monday, the team agreed to a deal with right-handed pitcher Zach Eflin. Eflin, who was in San Diego for a physical on Monday, agreed to a deal for $1.2 million.
The remaining unsigned players from the first 10 rounds are Stony Brook outfielder Travis Jankowski (No. 44 overall), right-handed pitcher Walter Weickel (No. 55) and right-handed pitcher Andrew Lockett (fourth-round). Both Weickel and Lockett were high school seniors.
All told, the Padres have now signed 33 of their 44 overall Draft picks.