Description: Braves catcher Evan Gattis hit a grand slam Wednesday against the Twins.
Insight: Gattis hadn't started since May 14, but he hit two pinch-hit homers in the last three games prior to Wednesday. He has 10 homers and 27 RBI, and the Braves are going to have to find a way to get his bat in the lineup more often.
Description: Mets catcher John Buck is hitless in eight career at-bats versus Cincinnati right-hander Mat Latos with three strikeouts.
Insight: Considering it's a day game after a night game and Buck's record against Latos, fantasy owners should not expect Buck to start on Wednesday. After a huge April, Buck's May numbers are well below expectations (.196, 1 HR, 6 RBI, .593 OPS).
Description: Royals catcher Salvador Perez is day-to-day with a deep right hip bruise and won't start Tuesday's game, according to Bob Dutton of the KC Star.
Insight: Perez suffered the injury Monday when he ran into a railing while trying to catch a foul popup. He's available in an emergency situation Tuesday and should be able to return to the starting lineup in a few days.
Description: Chicago White Sox minor league catcher Josh Phegley is making people notice down at Triple-A Charlotte, batting .333 with 10 HR, 27 RBI and a 1.052 OPS over his first 33 games.
Insight: The 25-year-old has consistently hit .300 over his minor league career, but this is the first time he's shown this much power. Should the White Sox tire of Tyler Flowers' .195 batting average, they could give the youngster a shot later this season.
Description: Minnesota catcher Joe Mauer is just 1-for-7 versus Atlanta right-hander Tim Hudson.
Insight: It isn't often that this career .323 hitter has a bad matchup, but today is one of them. In fact, the heart of the Twins lineup; Mauer, Justin Morneau and Josh Willingham are a combined 4-for-37 (.108) off Hudson. Tuesday doesn't figure to be a good offensive game for Minnesota.
Description: Tampa Bay catcher Jose Molina is hitless in eight at-bats versus Toronto knuckleballer R.A. Dickey.
Insight: Molina isn't much of an offensive threat to begin with (.221, .590 OPS) so his lack of success against Dickey shouldn't change many lineups. He's representative of the Rays' team lack of success against Dickey. Only one player on the roster has a batting average above .200 against Dickey (Kelly Johnson - .286).
Description: Rockies catcher Wilin Rosario is 6-for-14 with two homers, seven RBI and five runs over his last three games.
Insight: Rosario's 28/6 K/BB is subpar, but he has raised his line-drive rate from 17.3 percent to 21.7 percent since 2012 and has a 20.5 percent HR/FB on a 41.5 percent flyball rate. With all those flyballs, he's perfect for Coors Field.
Description: Minnesota catcher Joe Mauer has hit safely in all 14 games this month and is batting .456 in 57 at-bats during that span.
Insight: Mauer has been dealing with some back stiffness but he returned to the lineup Saturday after missing Friday's game and went 2-for-5. Mauer has a favorable matchup against John Lackey of the Red Sox Sunday; Mauer is 11-for-27 (.407) against the right-hander.
Description: Minnesota catcher Joe Mauer is back in the lineup Saturday against the the Red Sox.
Insight: Mauer (.349, 2 HR, 13 RBI) missed Friday's game due to back stiffness. He'll serve as the DH Saturday. He's just 1-for-10 with six K against Saturday's scheduled starter Ryan Dempster, but it will be difficult to sit him since he has hit safely in all 13 games this month and is batting .462 during that span.
Description: Rockies catcher Wilin Rosario is a career .455 hitter (1.509 OPS) versus two-time Cy Young Award winner Tim Lincecum.
Insight: Rosario's batting average has cooled over the past two weeks, but he's still doing everything fantasy owners expected of him before the season began - hitting for a decent average (.279) with plenty of power (8 HR, .815 OPS).
Description: Pirates catcher Russell Martin is in the starting lineup for Tuesday's game against Milwaukee.
Insight: Martin's return may have been accelerated by the Brewers swiping six bases off backup catcher Michael McKenry. Martin has been an offensive force this season as well, batting .263 with six homers, 11 RBI and an .884 OPS.
Description: Red Sox catcher Jarrod Saltalamacchia is not starting Tuesday's game against Tampa Bay.
Insight: No injury, just a day of rest for the catcher, who has played 29 games this season, batting .263 with four homers and 11 RBI. His 36 strikeouts in 95 at-bats is a little concerning, but catchers with an .828 OPS are hard to come by.
Description: Pirates catcher Russell Martin is questionable for Monday's game against Milwaukee due to neck soreness, but was available to pinch hit on Sunday if needed.
Insight: Martin dealt with the injury earlier this week and had a flareup Friday. Michael McKenry will continue to handle the catching duties while Martin is sidelined and he's produced a solid .831 OPS over the 14 games he's played this season.
Description: Rockies catcher Wilin Rosario is not in the starting lineup for Saturday's game against St. Louis. No injury, just a rest day after a night game.
Insight: Rosario is doing everything fantasy owners could want - hitting for a decent average (.295) with plenty of power (7 HR, .864 OPS). He continues to produce top-five fantasy value at the catching position.
Description: Braves catcher Brian McCann is not in Saturday's starting lineup versus the San Francisco Giants.
Insight: Despite the lack of any spring training work, McCann is off to a hot start, batting .308 with a home run and five RBI in his first three games. He'll likely get a day or two rest each week until he builds up his stamina.
Description: Cleveland catcher Carlos Santana is just a .100 hitter (2-for-20) versus Detroit starter Max Scherzer.
Insight: The Indians gave Santana Thursday off, but it probably would have been a better idea to give him Friday off. Santana (.358, 7 HR, 15 RBI) is one of the league's top-hitting catchers, but this is an unfavorable matchup.
Description: Rangers catcher A.J. Pierzynski has been moved to the disabled list.
Insight: Pierzynski (.263, 4 HR, 11 RBI) is out with a strained oblique. The move is backdated to May 6th, meaning that Pierzynski would be eligible to return on May 21st. Of course, it's possible that he could need more time.
Description: Giants catcher Buster Posey is not in Wednesday's getaway day game against the Phillies.
Insight: No injury, just the normal day game after a night game off. He's batting .282 with 4 HR and 19 RBI. Solid, but not the production we are used to from the 2012 NL MVP. The day off should do him some good.
Description: Cardinals catcher Yadier Molina is just a .167 hitter (3-for-18) against Cubs right-hander Carlos Villanueva.
Insight: Molina is having another fine all-around season, batting .333 and playing great behind the plate. It's a getaway afternoon game after a night game, so he'll likely get the day to rest anyway and avoiding this matchup is the bonus.