Named manager on Monday, Marlins general manager Dan Jennings makes the move from the front office to the dugout. Advance scout Mike Goff will be Jennings’ bench coach, while president of baseball operations Michael Hill and team president David Samson, with input from the entire front office staff, will handle day-to-day front office duties.

The trade market is the fastest way to improve your roster and weaken the competition at the same time. Smart owners should immediately send offers for the five players listed below, and then watch their teams soar up the standings.

When you stack up National League third basemen you come down to a difficult decision — who deserves to be in Bruce Bochy’s lineup more: the Cardinals’ catalyst, Matt Carpenter, or the Reds’ run-producer, Todd Frazier? You can argue it either way and not be wrong.

With a handful of teams off on Monday, there are only seven games on the slate. But there’s action from coast to coast, so keep an eye on these five things to watch for.

Jorge De La Rosa held the Dodgers scoreless on two hits in 7 1/3 innings before leaving with an apparent left groin injury, and Carlos Gonzalez, Daniel Descalso and Nolan Arenado homered as the Rockies ended Zack Greinke’s career-best win streak at 10 games and beat the Dodgers, 2-0, at Dodger Stadium on Saturday night.

For the second straight game, it was a battle of the bullpens, and for the second straight game, Cleveland won. Jason Kipnis hit a ninth-inning home run to break a deadlock and help give the Indians a 10-8 win against the Rangers on Saturday at Globe Life Park.

The A’s will place first baseman Ike Davis on the disabled list Sunday and are expected to promote outfielder Craig Gentry from Triple-A Nashville, MLB.com has learned.

Red Sox designated hitter David Ortiz isn’t bragging. He is, however, smiling. As one of the game’s premier hitters, Ortiz enjoys the challenge of facing the better pitchers. Few are as good, much less better, than Mariners right-hander Felix Hernandez.

Max Scherzer has been on the Nationals just since January, and he is already showing that he is worth the contract they gave him.

The Angels scratched across a pair of runs in a seventh-inning rally, Mike Trout and David Freese later added home runs, and Matt Shoemaker pitched a gem in a 6-1 win over the Orioles on Saturday night at Camden Yards. The victory, which came after a 57-minute rain delay, was the Angels’ fifth in a row and eighth in 10 games, putting them a season-best two games over .500.

The Astros overcame an early three-run deficit with a four-run sixth inning, highlighted by Chris Carter’s three-run home run, in beating the Blue Jays, 6-5, on Saturday night at Minute Maid Park. Houston extended its winning streak to four games, and three straight over Toronto.

Felix Hernandez acknowledged that he twisted his left ankle early in a rough sixth inning in Saturday’s 4-2 loss to the Red Sox, but the Mariners’ ace insisted that had nothing to do with suffering his first setback of the season.

Rick Porcello pitched into the seventh inning and Blake Swihart’s RBI double in the sixth plated the go-ahead run off Felix Hernandez as the Red Sox topped the Mariners, 4-2, on Saturday, handing Hernandez his first loss of the season in front of a crowd of 45,055 at Safeco Field.

The Nationals continued their hot hitting with a three-run first inning and Max Scherzer took control from there, striking out 11 over seven innings, to claim a 4-1 victory over the host Padres at Petco Park on Saturday night.

Saturday, for the second time in two nights, a Dodgers reliever struck out four Rockies in the eighth inning. This time, it was Sergio Santos, but he also allowed three runs in the inning for a 6-0 deficit in the Dodgers eventual 7-1 loss.

In his first at-bat Saturday night, D-backs third baseman Yasmany Tomas just missed hitting his first Major League homer when his drive to left smacked off the wall for a long single. In his fourth at-bat Tomas crushed a high fastball from Ken Giles the opposite way for a home run over the wall in right.

As rain began to fall at Citi Field on Saturday night, the Mets viciously broke out of a three-week offensive drought and scored 10 runs in the fourth inning of a 14-1 thrashing of the Brewers.