There's a couple different ways to slice things up for sure. One would be to just separate out their insane 13 game stretch to start the season versus what they've done since...
First 13 (0329-0413) 10 W - 3 L
287/358/478 (135 wRC+) 6.69 R/G
Next 92 (0414-0728) 50 W - 42 L
249/327/388 (103 wRC+) 4.47 R/G
I think those "Next 92" numbers are about the best estimate we have of the group's ever elusive true talent level at this point. The good news is that even with offense that is only a smidge above league average they've still played at an 88 Win pace for the majority of the season after a blazing start.
Another way to slice it up is to follow the ebbs and flows by team record, this time I'll include some pitching numbers and league ranks during each stretch to give a bigger picture view...
First 13 (0329-0413) 10 W - 3 L
Hit: 135 wRC+ (2nd) | 6.69 R/G (1st)
SP: 63 IP (26th) | 87 ERA- (8th) | 1.2 rWAR (11th)
RP: 53 IP (10th) | 91 ERA- (12th) | +0.61 WPA (8th)
[Pretty much clicking on all cylinders. Offense was unsustainably hot, bullpen was more good then elite, starters weren't throwing many innings but were preventing runs when they were out there.]
Next 23 (0414-0508) 11 W - 12 L
Hit: 97 wRC+ (14th) | 3.91 R/G (21st)
SP: 114 IP (22nd) | 114 ERA- (23rd) | 1.2 rWAR (23rd)
RP: 89 IP (7th) | 96 ERA- (14th) | +2.00 WPA (3rd)
[Offense regressed with Yelich hurt, starters put up their worst stretch of the year, bullpen made sure they won the games they were supposed to limiting the fallow stretch to only one game under .500]
Next 51 (0509-0703) 31 W- 20 L
Hit: 105 wRC+ (13th) | 4.75 R/G (9th)
SP: 236 IP (28th) | 98 ERA- (13th) | 4.1 rWAR (12th)
RP: 216 IP (1st) | 68 ERA- (3rd) | +5.71 WPA (1st)
[Offense bounced back with Yelich's return, starters kept the team in most games, bullpen was dominant. Went from tied for first in the NLC with Chicago on 0508 to having a seven game lead over STL on 0703]
Last 18 (0704-0728) 8 W - 10 L
Hit: 104 wRC+ (18th) | 4.39 R/G (18th)
SP: 84 IP (30th) | 99 ERA- (11th) | 1.0 rWAR (18th)
RP: 77 IP (9th) | 92 ERA- (14th) | +0.66 WPA (15th)
[Pretty middle of the pack across the board with the exception of the SP/RP innings. Crazy thing about the offense during this recent stretch is that most of the roster has been hitting...
Adames (78 PA | 129 wRC+), Contreras (76 PA | 105 wRC+), Chourio (68 PA | 137 wRC+), Hoskins (61 PA | 138 wRC+), Yelich (52 PA | 135 wRC+), Mitchell (47 PA | 130 wRC+), Perkins (36 PA | 126 wRC+), Bauers (27 PA | 192 wRC+) and Haase (25 PA | 214 wRC+) is nine of thirteen hitters above average and eight of them comfortably so.
That leaves Frelick (57 PA | 89 wRC+) who has been below average as a regular, Monasterio (24 PA | 63 wRC+) who has been bad as the last man on the bench, then Turang (73 PA | 8 wRC+) and Ortiz (47 PA | 10 wRC+) who have been absolutely brutal.]
If anyone made it this far, my takeaway is that in addition to the obvious SP need Arnold & Associates should to be looking long and hard for an IF that can supplant Monasterio and give Turang/Ortiz more consistent rest days.