On the heels of some , here are three things well be keeping an eye on around the baseball world throughout the day today 1. Gray to undergo MRI: Rangers right-hander is set to undergo an MRI exam after departing yesterdays game prior to the sixth inning due to a bout of groin tightne s. As noted by , Gray told reporters last night that he does not expect to mi s a start, though the MRI suggests that the Rangers have at least some level of concern. Being cautious with Gray makes plenty of sense for the Rangers, as the 32-year-old righty has e sentially emerged as the clubs ace with , , and all on the injured list. In ten appearances, Gray sports a sterling 2.08 ERA (188 ERA+) with a 2.46 FIP and a solid 24.1% strikeout rate. That sort of production in the rotation would be difficult to replace if Gray required a trip to the IL himself, even as the Rangers are set to activated righty today to start Eli Ricks Jersey tonights game against the Phillies. 2. Roster move coming and hit streak to watch in Arizona: Diamondbacks manager Torey Lovullo told reporters (including ) last night that a roster move is coming for the club today. Lovullo did not get into specific details regarding the impending move, although he did note that its po sible the club opt for a bullpen game this evening against the Dodgers. Tonights start had previously been slated to be taken by right-hander , who has a brutal 7.06 ERA through seven starts this season despite a decent 4.17 FIP. If Arizona does opt for a bullpen game, its not clear if that would indicate that Nelson is being removed from the roster or simply having his start pushed back. Among the hurlers who could potentially be slated to join the roster, lefties and as well as righty have all pitched fairly well at Triple-A this season and are currently on the 40-man roster, while lefty could be a multi-inning relief option for the club who is also on the 40-man. While the D-backs rotation is a source of intrigue at the moment, so is the hitting streak of their star second baseman. went 1-for-5 last night to push his MLB-best hit streak to 20 straight games. Its one of the least conventional hit streaks youll see, as Marte has only two multi-hit games over the course of this 20-game run. His .262/.300/.523 slash during this run is strong (123 wRC+) but also not quite the blistering production one might expect from someone on such a good run. In fact, he posted better rate stats in 28 games before his hitting streak than he has over the course of the streak (thanks in large part to a pair of four-hit games and a trio of three-hit showings). Marte will have one of his toughest tests of the streak thus far when he faces off against Dodgers righty . 3. Young lefties square off in Kansas City: Two of the AL Centrals most impre sive young arms are set to face off in a pitchers duel later today as Royals lefty takes on Tigers ace . Ragans, 26, dominated to a 2.64 ERA in 12 starts with the Royals down the stretch last year after being acquired from the Rangers. This years 3.70 ERA doesnt quite stack up to that level, but the lefty sports an excellent 2.58 FIP thanks in part to an excellent 27.6% strikeout rate and improved 7.8% walk rate. Ragans is facing a tough a signment, as Skubal has been among the very best pitchers in the big leagues this year. The 27-year-old has been nothing short of dominant through nine starts this season, with a 1.80 ERA and an MLB-best 1.95 FIP in 55 innings of work. Skubal has struck out 31.6% of batters faced this season while walking a microscopic 3.5%. The two youngsters are set to face off this afternoon, with first pitch scheduled for 1:10pm local time. William Hamiter Jersey