The Padres — and Jackson Merrill — are scorching hot

State of play: They're tied with the defending National League champion Arizona Diamondbacks for the second wild-card spot, owning a four-game lead over the Atlanta Braves for the final spot in the NL playoffs.

Driving the news: The Padres logged an 8-2 win yesterday at Petco Park, completing a three-game sweep of the Pittsburgh Pirates.

Zoom in: The story of the midseason surge has been center fielder Jackson Merrill, who has burst into contention for NL Rookie of the Year.

• In the second half of the season, he's batting .321 with five home runs, while flashing elite defensive skills like this diving catch to close out a 2-1 win Monday night.

Between the lines: Merrill just turned 21 in April and came into the season as the club's star shortstop prospect, having played outfield in just five minor league games.

• But the team put him in center field anyway, tapping his superstar potential, and watched him make the All-Star Game in his first taste of the bigs.

• He was good in the first half, batting about 10% above league average, but has been great since the All-Star break, hitting nearly 70% above league average.

What we're watching: Pitcher Joe Musgrove returned from injury Monday night, throwing 4⅓ scoreless innings.

• The Musgrove of old beefing up the Padres' starting rotation would be a bigger acquisition than even the big trade-deadline moves the team made to fortify its bullpen.