Dave Eiland understands that Jacob deGrom hopes to be the Opening Day starter. The Mets pitching coach knows deGrom deserves to be on the mound March 29 at Citi Field when the Mets begin their 2018 season. But this isn’t a perfect spring for deGrom, who was pushed back with back tightness a week ago. Eiland was not ruling out deGrom being ready for Opening Day, but it obviously became less likely on Sunday when the righthander did not face batters. Eiland is not messing around with deGrom’s health. “With Jacob deGrom we will not make an exception. That’s stupid,” Eiland said Sunday. “We’re not going to be careless. We’re not going to be careless, just so he can pitch Opening Day. If it falls to where he can, he will, he earned it. He deserves that start. We’re not gonna push the envelope and be careless and he starts Opening Day and he doesn’t start again until June. It would be pretty ignorant on our part.” After two straight years of having their seasons destroyed by injuries to the rotation, the Mets are erring on the side of caution with deGrom. Instead of facing hitters in live batting practice Sunday as he said he had expected, deGrom threw a regular bullpen session with Michael Conforto standing in to track pitches. The next step is to play light catch on Monday to see if his back is still feeling good and then pitch in a simulated game.