Wasim Jaffer registered his 50th first-class hundred to rescue Mumbai from a precarious position and take them to a decent 254/8 at stumps on Day 1 at Mumbai.
In Rohtak, VRV Singh picked up a fifer to help Punjab clean up Haryana for a paltry 163.
Abhimanyu Mithun grabbed a six for in Cuttack to bundle out Odisha for 226 in another Group A encounter.
In Chennai, Abhinav Mukund notched up a splendid unbeaten 103 to help Tamil Nadu to 268/2 at close of play.
Arindam Das amassed a dogged unbeaten 139 as Bengal dominated proceedings in Delhi against Services.
In another Group B clash in Vadodara, Yusuf Pathan picked up a 4-fer as Madhya Pradesh were skittled for 61.
In Dharamsala, Rishi Dhawan's 5-29 annihilated Assam and they were bowled out for 81.
In another Group C face-off, Amogh Desai helped Goa to 231/8 courtesy a fine hundred against Tripura at Porvorim.
Here are the Day 1 stump updates from all the Ranji games:
Brief Scores:
Group A
Mumbai vs Vidarbha in Mumbai: Mumbai 254/8, Jaffer 133 not out.
Haryana vs Punjab in Lahli: Haryana 163, VRV Singh 5/38, Punjab 50/3.
Jharkhand vs Gujarat in Jamshedpur: Jharkhand 194/5, Saurabh Tiwary 75.
Odisha vs Karnataka in Cuttack: Odisha 226, Mallick 98, Mithun 6/52, Karnataka 22/0.
Group B
Tamil Nadu vs Saurashtra in Chennai: Tamil Nadu 268/2, Vijay 62, Mukund 103 not out.
Services vs Bengal in Delhi: Bengal 242/3, Das 139 not out.
Rajasthan vs UP in Jaipur: UPCA 226, Rajasthan 0/1.
Baroda vs MPCA in Baroda: Baroda 152 (Jalaj Saxena 6/42) and 9/0, MP 61 (Yusuf Pathan 4/17 and Ketul Patel 4/9).
Group C
Andhra vs Maharashtra in Kadapa: Andhra 232/3.
Himachal Pradesh vs Assam in Dharamsala: Assam 81, Rishi Dhawan 5/29, HP 199/4.
Jammu & Kashmir vs Kerela in Jammu: J&K 312/4, I R Singh 98.
Goa vs Tripura in Goa: Goa 231/8, A S Desai 102.