That onslaught started with Fernando Tatis Jr.’s slam Monday night on a 3-0 count with a seven-run lead, reigniting a debate about etiquette and baseball’s so-called “unwritten rules.” Wil Myers hit a slam on Tuesday, Manny Machado had a walk-off grand slam in the 10th inning Wednesday night and Eric Hosmer capped the run with a historic shot on Thursday night.

Hosmer batted with the bases loaded Friday night but grounded out.

On Saturday night, Myers opened the second inning with a homer and Grisham hit a three-run shot with one out, with Cronenworth aboard on a single. Tatis was hit by a pitch from rookie Brandon Bielak (3-1), who made way for Castellanos. Both teams were warned by the umpires, and Houston’s Martin Maldonado was ejected from the dugout.

Grisham also hit a leadoff shot and Machado had a solo shot with one out in the first.

The six homers tied the Padres’ home record set Aug. 9 against Arizona.

Davies held the Astros to two runs and four hits while striking out seven and walking two in going eight innings for the second time in his career.

Davies retired 11 straight batters between allowing Yuli Gurriel’s sacrifice fly in the first inning and Taylor Jones’ first career homer in the fifth.

Bielak allowed seven runs and five hits in 1 1/3 innings, struck out two and walked one.