Monday's outing could be a big step for Johnson, who also threw a simulated game in April and felt triceps tightness afterward, slowing his recovery a bit.
Johnson signed an incentive-laden deal with the Padres in December, based mostly on how many starts he makes with the club. He hasn't pitched in a Major League game since 2013 with Toronto.
Worth noting
• The Padres acquired 23-year-old left-hander Brad Wieck from the Mets on Saturday, completing the trade that sent Alex Torres to New York. Wieck, a seventh-round pick of the Mets in 2014, had a 3.