I'm sure that was his rookie weight just like Clemens when they listed him at 205.225 is almost malnourished for 6'10. Johnson was far thinner than Jake.
BTW ideal weight for a 6 10 male is 214-262.
6 4 male is 182-222. The fact that he's listed below that tells you everything you need to know. I bet he's closer to 170. deGrom is beyond what anyone would call wiry